[quote=@Bounce]I personally think your "No Marvel or DC, but everything else" will run into challenges in terms of balance, competing/conflicting themes, and disproportionate power sets.
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We've tried to run a Indie Comics game (and thats far more focused than such a idea) a few times and we always end up with these issues, I agree. The only one who really feels inspired is whoever gobbles up the TMNT or Hellboy, I find.