I think a Red Hood Outlaws DLC would be awesome!
You know, this guy.....


Red Hood! He'd be a really great match for Death Stroke. His alternate costume as Robin would be really cool too. Maybe he can finally put a bullet between Joker's eyes.....if Joker isn't dead already ;)

Ambush Bug
Rochach
Martian Manhunter
Blue Beetle
Black Mask
The Question
Zatanna
Plastic Man
Larfleeze
Atrocitous
Ocean Master
Black Manta
Animal Man
Klaron the witch boy
Dr. Fate
Vandel Savage
Jonah Hex
Metallo
Bizarro
Batzarro
Owlman
Red Tornado
AMAZO
Captain Atom
The Atom
Beast Boy
Count Vertigo
Etrigan
Metamorpho
Darkseid
Brainac
Orion
Firefly
Livewire
Clayface
Wildcat
Paracite
Static
Circe
BOOSTER F'IN GOLD
Vibe
Steel

sad thing is that most of these characters i would achually like to see

honestly id love bob kane to be a dlc charachter

Why?

heros

zatana

blue beetle

ms martian

alan scott green lantern

black canary

firestorm

aqualad

arsenal

villains


hades

firefly

vandal savage

braniac

mirror master

captain cold

circe

black beetle


dlc stages

the reach ship

j.s.a hall

apokolips

Martian Manhunter
Brainiac
Black Manta
Poison Ivy
Darkseid
Red Tornado
Dr Fate
Silver Banshee

It would be cool if Injustice has an unlockable system (like MK DA+) where you can go to a menu and unlock stuff (I wonder if Injustice will have something like that, like Hall of justice or something).

For 'Clone' characters I would not mind if they were unlockable through the game or as free/bonus addons with New charcater addons (like classic costumes were free/included with new characters for MK) like:

Batgirl,Owlman,Batwoman,Red hood-Batman
Tim Drake-Nightwing (Drake also fights with a staff too)
Power/Supergirl-Superman
Wondergirl, Superwoman-Wonderwoman (though Superwoman don't fight w/ sword,shield,lasso.... I guess maybe she'd fall under Superman category?)
Red Arrow,Speedy,Artermis-Green Arrow
Superboy-Superman (assuming Superboy with full Krypton powers)
Miss Martian, Green Beetle-Martian Manhunter
Aqualad-Aquaman
Kid flash, Impulse-Flash

And so on so forth.

I can see a lot of addon potential for Injustice. I just hope they're reasonably priced (individually or bundled)

hilarity's sake

besides he would give an awesome tutorial