they havent said how many there will be they just say "twenty something" the demos and whatnot show 24 character spots and confirmed playable characters are 1.Bane 2.Batman 3.Catwoman 4.Cyborg 5.Deathstroke 6.Flash 7.Green Arrow 8.Green Lantern 9.Harley Quinn 10.Joker 11.Lex Luthor 12.Nightwing 13.Solomon Grundy 14.Superman 15.Wonder Woman
Aquaman, Ares, Black Adam, Captain Marvel, Doomsday, Hawkgirl, Raven, and Sinestro are all in the story but NRS hasnt confirmed them as playable. Geoff Johns(chief creative officer at DC) tweeted he played Aquaman then deleted the tweet Black Adam was hinted at by Ed Boon on twitter the same way he hinted at Deathstroke, Green Arrow, and Green Lantern, who are all playable Captain Marvel(Shazam) is the only MKvsDC character that hasnt been confirmed yet
so yeah there are at least 9 spots open with 8 story characters not confirmed so AT LEAST 1 more that hasnt shown up so far but there will be DLC and 24 is NOT the official count
They say 'over 20' on the official website and reportedly there were 24 slots.
MK9 had 26 official slots (27 including Kratos for PS3) plus two unlockables and 4 DLC. So I'd go roughly between 24-27 slots not counting DLC or unlockables.
wasnt Quan Chi the only unlockable in MK9? there were 28 before the 4 DLC characters, then Kratos for ps3
Quan Chi and Cyber Sub Zero (whose gameplay is totally different from default Sub Zero). I'm a 360 user (and before anyone asks, this board is more active which is why I participate on the PS3 Injustice board) so no Kratos for me.
Default roster- 26 (360), 27 (PS3) Unlockables (Quan Chi & Cyber Sub Zero)- 28/29 (360/PS3 respectively) DLC- (Skarlet, Kenshi, Rain and Freddy Krapger)- 32/33
Currently Playing- DC Universe Online, HM: A New Beginning, Two Worlds II Wanted- Injustice: Gods Among Us, Fire Emblem Awakening