I voted Swamp Thing, but I think Animal Man (or Vixen I guess), Red Hood, Blue Beetle (esp. Jaime Reyes), Static, and Etrigan would be awesome.
Some suggestions who weren't on the list: Plastic Man, Creeper, Katana, Blue Devil, Red Tornado, and Mera (shaping water could be cool)
omfg what is it with you fan girls and Jason Todd!?!?! hahaha
Seriously, everyone on Comicvine acts like a Red Hood fan yet his book doesn't sell as well as it should with his fanbase...odd.
plus I mean really? another bat character in Injustice? kill me now. can we please just think a little bit of diversity, just a little bit please, guys??
Martian Manhunter is already in the game, as a background character and I guarantee you guys whine to get him in he wont even be your most playable character unless you are a die hard.
I wish Atrocitus was playable but he is already in the game
Even though technically Zatanna first appeared ina bat book she really isnt a Bat character and can be a lot of fun to play, also different skins for her would be nice (pre52/new 52)
I voted I voted BLACK MANTA adds another much needed villain in the game,
I could only vote once but if i could vote twice I also would've voted Animal Man even when he was in vertigo made occasional appearences in the DCU
now he is completley in the DCnU. a great addition with that much needed diversity, also midnight would bring the wildstorm diversity with just him alone. he is more well known now.
but an honorable mention is FIRESTORM! how is he not on the list, Killer frost is in the game but Firestorm isnt!?! lmao
that's almost as bad as Blackheart being in MvC2 and Ghost Rider wasn't lol
on top of that Firestorm would be a great technical/ranged fighter he could do many things you can definitely make a fun moveset with what he can do.