Title pretty self explanatory.
Possibilities: Aquaman, Lobo, Martian Manhunter, Darkseid, John Stewart, Darkseid, Doomsday, Black Adam, Bane, Killer Croc, Cyborg, Metallo, Darkseid.
What we know so far:
-Never been played before in live action. (Doomsday, Bane, Cyborg, Aquaman?, crossed off list.)
-Its not Green Lantern (John Stewart crossed off list.)
- Same power level as Superman (Lobo, Darkseid, Doomsday, Metallo?, Darkseid left on the list.)
-He mentioned Black Adam
-Lobo has been scrapped
-Metallo is a rumored second villain for Batman vs Superman.
-He never said which movie he'll be in.