Re: Justice League-type DC/Champions campaign. Advice, please.
Yeah, I can see the wisdom in pre-defining powers and focusing on a theme where you can. I accept that, sure.
But as for your take on "Cosmic", I submit the rule found on page 122 of Champions Complete, it is the last sentence in the final paragraph of the second column, under Variable Power Pool: "Typically, these powers are linked by common Special Effects, such as 'gadgets,' 'magic,' or 'mentalism.'"
And, of course, "typically" would - by definition - mean "not always." Still, I can't argue the VPP would be more interesting (and flavorful) with a more defined special effect.