I might eventually make a character sheet and quit bothering you all with my rambling.
Generally, when you're stuck on what to do and unsure of direction, then the cardinal rule of life applies: keep it simple, stupid.
Amalgamations are a tricky one. Personally, I don't have as much of an issue if it's something like Green Lantern or Dr. Fate; when the powers are tied to an object, who's to say that a Marvel character wouldn't find it before a DC character or vice versa? But I always try to keep it in the realm of "which characters run in the same circles?" Carol Danvers is a perfect Lantern, IMO, because she's already so tied to space. Many of her allies and enemies transfer over. But something like Matt Murdock GL? It's trickier.
I'd echo Wraith's thoughts.
Plus it's a One Universe game, not an amalgam game. We aren't setting out to amalgamate characters here. We're combining two universes while interpreting/modernising the characters in them. There might be some amalgamation of certain aspects along the way but to set out to amalgamate characters as an end in and of itself is probably a little misguided.
@Nib yeah but it's kinda unnecessary.
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Just cause it's 'One Universe' you don't need to make a Marvel Hero into a GL or a DC char into a NovaCorps. You can always just use a generic char and have the differences be due to the union, like I'm sure the GL-Corps is different with the NovaCorps existence and vice versa, like Bounce said.
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I do have other ideas and concepts I can explore, so if my GL app is stepping on anyone's toes I can easily put Kai-ro back on a shelf and pull down one of any number of similarly bad ideas.
I could always sub Sam Alexander and approach the same universe from the Nova Corps side. And I also have a Justice League Dark concept I drafted up for a game that fell through I could pull from as well. And then there's always pulling out Garfield Logan for random green dancing cats.
I think it's a little early for Blue Lanterns to be popping up.
While I understand the emotional spectrum is a large part of the Green Lantern mythos now, it took decades to introduce them in the comic books. Why not take some time establishing the GLC before rushing ahead? Especially given this is a Year One game.