I also still want Aquaman and the Black Canary. The Black Canary could have some cool abilities somewhat like Sindel but with some cool combat skills!

I think it's Doctor Fate. Maybe Superman or Batman or captured him or something and that's why he's in that tube thing.

I would be very surprised if Black Canary wasnt in. They have to have at least one or two more females and I think Black Canary would fit in perfectly, plus she is pretty popular and has history with many of the current cast members (i.e. Green arrow)

Well I definitely hope she makes it in. She definitely would have some cool gameplay elements for sure!

Most likely along the lines of story reasoning, where superman starts locking up potential threats to him, in those tube like things that disallows their powers? Not sure...could be nothing in the end.

Yeah iirc he's able to keep various alien creatures in the Fortress and they never breakout and rampage about so he probably has ways to nullifying peoples powers.