Booster Gold: Maybe in the sequel but he's not as popular as the confirmed heroes. He would be very awesome in a sequel since he has a lot of potential to be fun to play with all his gadgets but sadly, I don't see him in the roster.

Batwoman: We have Batman, Catwoman and Nightwing already so having a FOURTH character with similar moves over Red Hood and Batgirl is redundant but she does have some cool gadgets.

Arkillo: Not only is a grappler with ranged attacks probably going to be a balancing nightmare but he's way too much of a character who'd be in the sequel once NRS have all the characters from the original fine-tuned.

Grifter: Well he has both a sniper rifle and telekenesis and would probably be a ranged powerhouse... but he's far too obscure. He's becoming more popular but doesn't have enough recognition to be in the first game. Fingers crossed for Injustice 2!

Human Target: He has no superpowers and can't do anything in a fight that Deathstroke can't and isn't as cool as Deathstroke.

Steel: He may POSSIBLY be DLC since he is popular but he's far too idealistic for Injustice despite having some cool jetpack and hammer attacks. He might be in the sequel though or DLC since it's hard not to like Steel.

Artemis: Nightwing has a staff already. I don't see how she'd be different. maybe if Nightwing isn't in the sequel we'll see her but I'm not counting on it.

Magog: For how much Injustice seems like Kingdom Come, I don't see Magog fitting into the storyline. He could end up in a sequel but it's pretty safe to write him off.

Deathstorm: Because he's just too silly of a character to make it in. I love how funny he is but Injustice isn't really going for a lighthearted story.

Clayface: Animating all his abilities on current gen hardware is next to impossible. you'd need a cutting edge graphics card today to see Clayface in a match without severe FPS drops. I'm going to count him out.

Captain Nazi: Do I even need to explain why it's a bad idea to put this guy in a PvP fighting game? His as ridiculous as Deathstorm but more offensive than Seth McFarlane at the Oscars.

Lois Lane: Even if Joker didn't kill her, she'd never be in this.