Re: Captain Nebula
re: name: Nah, you're not overdoing a theme, you're homaging the Golden and Silver Age. Especially the Silver Age. Everyone had names that were either alliterative or referential. Category one: Clark Kent, Lex Luthor, Lois lain, Lana Lang, Gorilla Grodd, and so on. Category two: Knight and Fogg, Dr. Octopus, Dr. Steven Strange (a twofer- alliterative and referring to a strange ability), and so forth.
When I really get a good idea with my heroes, it works out that way, too. Homage is totally cool. I devised a thrown objects guy whose secret ID name is Clinton Queen (both an alliteration and an homage to Hawkeye and Green Arrow. Not throwers, but close enough). One of the crime bosses I devised is obsessed with the power of light and darkness, and his name is Dr. Reisenscheine (say it out loud).
Point is: Character names can be corny, or they can be good, but the best names are both.