While I agree that it would make sense to put the best DC heroes in a Rocksteady game, I don't think those reddit sources are accurate.
1) SoMeh was wrong on about half of the stuff he tried to leak at E3 and he hasn't made a post since then. It's obvious he was a fake.
2) DeuxXVentus, I've never heard of him, but he credits Sciurus as a legit source and I know firsthand that Sciurus is full of shit. He tried to pass on info that he got "from an email" and said that Rocksteady's game would be a Superman game with other Justice League members, and that it would be revealed at Microsoft's conference at E3. He also said that he got an email with a picture from this supposed Rocksteady Superman game, and said if he was wrong he would show it. Well, E3 past and not only did he not show the Superman render he kept talking about, but he deleted the videos too. If he was legit he wouldn't have done any of those things.
That being said, I'm just mainly concerned that
jschreier still hasn't outright debunked Superman. He's debunked "World's Finest", Batman and I guess Justice League, but he's never said the phrase "Rocksteady isn't working on Superman" or "Superman isn't in Rocksteady's next game." So, until he says that I'm gonna hold out hope. Jason, if you're 100% certain, it would be cool to just say it outright to kill any and all hope.