Opal

Maybe a little silly, but...
 
A precursor race - Atlanteans, ancients, proticultures, slavers, olympians, whatever - created planetary defenses for the earth thousands of years ago.  
 
To modern human eyes, though they just look like piles of rocks - pyramids, zigurats, Neolithic megaliths, etc - attacking the components directly with advanced alien weapons would activate them, so, instead, the invaders have been trying to get humans to demolish them piecemeal.
 
I just liked the idea if the mcguffins not being little portable things hidden away.
 
For the control system to use the weapon proactively, it's not a bunch of hidden items,  either, it's coded into human genes.  Some from each human population.  Unfortunately humans are kinda into genocide, so some of those ancient populations have been dispersed or all but whiped out.  Others have mixed.
 
So it's necessary for a diverse set of human representatives to unite and defend the planet by consensus control of the ancient weapon.

You could try a Rod with seven parts.
 
I don't think anyone would mistake that for ripping off the Infinity Stones.

Oh, I also meant to mention that another thing that's been going on over on the D&D side of the hobby (which is, of course, the lion's, or even the T-rex's, share of the hobby), is the old fogies of the game's early days coming out and sharing their memories.  Like Rob Kuntz, I think it was, was on ENWorld just chatting with people about his relationship with Gygax back when D&D was being developed. 
That seems to energize some fans.

"The Edition War" went beyond just that one bit of misinformation, but yes, the point being that D&D strayed from tradition for a bit and did much better when it reached back to it's earlier incarnations. 
 
So, yes, there are gamers out there who can be rdawn in by appeals to tradition/nostalgia/originalism.
 
Fuzion was also analogous to 3e D&D, in that it was an attempt at an open-source RPG, and while it changed the game cosmetically, it left the core balances (and imbalances) - the system-mastery dynamics - very much the same.  It was also in addition to Hero, rather than a replacement for it.
 
4e D&D, though,  was also analogous to Hero 6th, in that both changed significant, long-standing elements of the rules that impacted dynamics especially, in terms of system mastery, and for legal reasons changed around IP & lore.  Of course, D&D had a lot further to go in a single ed than just eliminating a few 'cost breaks,' and Wizards'  'legal reasons' were self-inflicted. 
 
It just seems like D&D fans were a lot more vindictive about it.  Fuzion wasn't really quite Hero, so I kept playing Hero; 6th kinda lost me, but I just stopped paying attention for a while.  3.x & old-school D&Ders went off on 4e like it was an E′phraimite trying to sneak into Gilead without saying "Shibboleth."
 
Opal was the first Champions! character I got to play long-term, and the single character I played the most, so when I found Red October I used her name, and that just became my handle for Hero discussions.  She was inspired by an image from an 80s video of a strange-looking platinum-haired woman in a mirror-like silver costume that reminded me of the flared-shoulder look of old sci-fi costumes.  I'm not sure what else went into her, but I did decide to give her 'Unearthly Beauty' since she was an alien, and Barbara Bain fit the bill - beautiful, but not an approachable beauty - when I visualized her.   At least, the way 18yo me remembered her from Mission: Impossible re-runs and Space:1999 10 years prior. 
And, yes, I loved Space:1999 and UFO and what other Gerry Anderson shows I got to see as a child - even the supermarionation. 

Magrathea!
 
Yes, the planet Earth is the Maguffin and the Empress has NO idea.  She knows it's a living organism (the whole Earth is a very complex organism for Maguffin purposes) but thinks it's something in the Earth, or made by people, or maybe animals, or aliens brought it or whatever.

Wizards o/t Coast could barely get anyone to buy modern/balanced/accessible 4e D&D, but as soon as they brought back the familiar brokednessity of 80s D&D and recycled the Red Box cover, they had a full scale comeback on their hands and D&D sold faster than ever.

Wizards o/t Coast could barely get anyone to buy modern/balanced/accessible 4e D&D, but as soon as they brought back the familiar brokednessity of 80s D&D and recycled the Red Box cover, they had a full scale comeback on their hands and D&D sold faster than ever.

Jason has given me permission to include Gremlin with WITCH as well

Magical & cult like elements. Gonna add WITCH for ya too

If their some math genius I think X-Axis is a good name because speedster usually go horizontal also because anything with the letter X is cool
 
Or

if you’re going for funny and if they use the power of thunder or are really loud when running it would be a funny name to have Thunder Thighs 

6e powers haven't changed enough to make them irrelevant.  If you wanted to simulate them through 6e powers, you'd pretty much use the same route as you would have used in 4e.  I'd also recommend the Incomplete Character rules by James Jandebeur, which can be seen in Digital Hero #10 (or on the Wayback Machine here.  He started with the Spirits rules as a basis, looked at what they had in common with Vehicles, Bases, Computers, AI, and so on, and synthesized them into a pretty decent rules package.  

You're also doing a male & female version of each, I take it.  
 
The male Apex upthread and female one you linked both look 'sweet' to me, like they're each on the gentler side of heroing.  The male is all muscled and may even be flexing, but not in a way that looks aggressive, and his facial expression is just... sweet, maybe a trifle sad.  The female version's pose is less serious, though.
 
The male vs female Dr Nope, OTOH, you have an aggressive pose for the male and suggestive for the female - if that were consistent throughout your artwork you might stop and think about it.    
 
Please, note, I'm not saying every female illo has to be aggressive or heroic, just a reasonable proportion of them. That and some males need to be depicted in other ways, too - maybe  even including suggestive ones.  And I know that last bit it tricky.

Scarlet Star Samurai
 
A popular multi media title Scarlet Star Samurai is eponymous main character A holographic techno magic girl defending a futuristic Japanese space station.
 
The latest version of the Anime was about to Launch so most people thought it was Just a Publicity stunt when the Holographic Display facing the famous Shibuya Crossing in Tokyo stepped down from the plinth and stopped a speeding car that was about to plow into the pedestrians with a holographic shield.
 
S3 or Akasuki Hoshi wasn't a publicity stunt in fact she doesn't know what she is she has all the memories of her fictional counterpart a dead girl resurrected by her scientist father in the form of a hard light hologram generated by a floating drone she has been welcomed by the Seven samurai while she tries to work out where she came from bet that  another dimension where her character is real or created by some super-scientist Otaku. She lives as a normal school student to learn about modern Japan while using her powers to defend it and the world.
 
her powers are all based around her hard light holograms which protect her core can make energy shields  from personal to the size of bus she's also able to make incredibly sharp blades usually Katanas but she can manifest any kind of historic weapon she also can make energy beams with a power range from a beanbag round to a main battle tank mostly she will make her arm into an energy weapon but it just depends how she's feeling sometimes she does Eye beams or Kamehameha/ spirit ball style attacks.
 
her holographic body allows her to change everything about her appearance while she mostly uses it to have a constantly changing range of Kawaii outfits when the team needs an infiltrator she can duplicate anyone's appearance or even create energy shields that disguise whole areas.
 
she's also a skilled hacker able to interface with most unshielded technology and control it.

The Chef
 
Chicago is also known for food and that is where The Chef comes in. He uses food and cooking to fight crime. It seems weird and non-sensical but it works although the police will shrug their shoulders as they don't know why. They cannot argue with the results as villains have stopped to have a pizza or a hot dog or Polish sausage and are captivated by the recipe or taste and stay to talk which allows the police to arrest him. Villains have also been distracted watching The Chef at work.
Several other heroes have said 'If it is stupid but it works then it ain't stupid' 

I was wondering what had happened to Bill Mantlo since he wrote a lot of the stuff I liked in 80s Marvel.  Turns out he got a law degree, got accepted to the bar, then got into a terrible accident that left him in a coma.  When he woke up, he had severe brain damage, and couldn't do any of the creative stuff or law work that he used to. Its really tragic
 
The story behind the comics is interesting.  Mantlo got a bunch of the Micronauts toys for his son, and became interested in the characters, imagining their personalities and stories for them.  He got then-Editor in Chief Shooter to set up a licensing deal where he could do their stories.
 
Michael Golden was uncomfortable with fame and left comics to do advertising art, which he found much more interesting (??).  Dude was one of the best artists alive in comics.

Not that I haven't already been told that the EU doesn't count, but I still feel like the cause of 'uniting' Europe is a bit out of date in the sense of already partially accomplished, not really all that sinister as a goal (until you get into the means), and well within the Oberlin window of thinkability - not the kind of thing heroes should be immediately up in arms to stop.    OTOH, White Supremacy, even if in genre, Nazis have kinda got it covered, is an obvious evil that broader western culture has been moving away from since the end of WWII (if not for much longer), has a proven historical record of extreme awfulness, is essentially unthinkable as a civilized goal, and immediately prompts heroes to suit up and go punch some Nazis .. er.. White Supremacists.
 
So, I agree, way more villainous than Esperanto-speaking-guy wanting to unite the Old World - the only downside is it risks loosing any uniqueness the theme of Eurostar might have by making them just another batch of comic book Nazis. 

Aside from Texans.

Wow, going back to colonialism, but from a united Europe instead of competing empires?  That is exactly the kind of comic book supervillainy I'm looking for from Eurostar.
Keep Fiacho (or replace with his daughter, I like Hermit's idea), and shift the rest of the team to not just be thugs from various places in Europe to instead be representatives of the past Empires.  English, German, French, Italian, Spanish, Portugal, etc
 

The Bear
 
Thought to be a lycanthrope, The Bear is unleashed on any critics of The Capitalists. Otherwise it is kept away but heaven help any police officers or journalists or protestors who try to meddle in the affairs of the group as it will be set upon them. Normal gunfire does not seem to bother it in the slightest but it recoils from fire. It will however remember who used that power and will take revenge at a later date.

UNTIL was in the original Champions!, it's been part of the game since the very beginning.
 
I realize that's not what you're asking, though, sorry.
But probably in the core book?
 

Atom Smith
 
Conceived in the closing days of WWII for use in an anticipated atomic war in Europe, the idea was to combine the armor & firepower of a tank with the mobility and versatility of infantry, the result was one of the earliest powered-armor suits, a very heavy fission-powered affair that proved impractical to mass produce but saw limited success as a military-sponsored super-hero battling giant monsters and other threats.  It was not popular with the press nor the anti-war and anti-nuke crowds and was decommissioned in 70s, declassified in the 90s, and quietly scrapped and sold piecemeal in the midst of the Great Recession.
Today, an obviously re-assembled, refurbished, & upgraded version (minus the missiles & tank gun) operates as a retro-patriotic arch-conservative supervillain.  With a 50's-style 'atom' design on his chest, and a scaled up blacksmith's hammer in hand, he uses the name, Atom Smith, a pun on Wealth of Nations author, Adam Smith.  While the armor is strong enough to handle it's own considerable bulk (2 levels of growth and several of DI), its primary power, obviously not part of its original design, is the seemingly ex-nillo creation of wrought-iron objects - walls, riveted plates, chains, manacles, wrecking balls, or whatever else suits the wearer's fancy, which he can then move about at will, apparently through some sort of magnetic control.
Since getting a lumbering piece of cold war junk working would require incredible resources, the general assumptions is that Atom Smith is some mad billionaire industrialist (though, most heavy industries are offshored and/or run by giant corporations, these days, so there's even a conspiracy theory that the armor is sponsored by China or Russia). 
 
As a bonus, chose the secret ID/origin you prefer:
(OK, yeah, I just couldn't make up my mind)

Legal Offices of Schwammberger, Eichmann, & Rauff ?
 
Cut-rate attorneys specializing in defending unsuccessful supervillains.

For a half second I misread that as "Fiacho united Europe."
Y'know, you could take a sinister conspiracy twist on Eurostar and have them either long since officially disbanded or reformed, but, in secret, Fiacho was the power behind the scenes that got the EU together, and now rules from the shadows, and Eurostar will come out of those shadows to put down any heroes that stumble their continent-wide conspiracy.   
 
 
Seems like this just came up in the Australia thread, too.  Yeah, there are stereotypes of Americans, and no you might not freak out over them.  And superheroes are, seen in a good light, Archetypes -  even, perhaps especially, the better, more memorable/successful ones -  but, spun the other way, archetypes become stereotypes, that could be offensive, or just shallow.  
 
 
 
 
So she'd be a MILK
 
Mother
Insane &
Likely to
Kill you
 
Where they Spanish, Italian, or Portuguese?  No?  Texan?   Ok, whatever.   I guess when the genre exemplar is 'Blue Oyster Cult' I can't go reading too much into the names.