Shazam is also missing. They could be patched in at a later date. I'm not too concerned though. Considering that the majority of the roster actually did make it in and the game is free, I'm very happy with it.

But... I just want to see Ares before launch.

I think if the game does well (the iOS version) I'm sure more character will get patched in. I think they just limited it, as to not spoil everything for the console version of the game prior to release. So far I've noticed: Hawkgirl, Aquaman, Aries, Killer frost, Raven and Shazam are all missing.