After the hit of Mortal KOmbat 9 the developers said they were taking a break from the MK saga... however not from fighting games at all.
Injustice, Gods Among Us is a fighting game based on the DC universe comics developed by Netherreal Studios, the ones behind Mortal Kombat, Arkaham City Lockdown and also supported Rocksteady in Batman: Arkaham City
Acording to Ed Boon the game is going to have a biggers roster than the previous MK so it's presumed to have around 30 characters.
Confirmed so far are: Superman, The Flash, Wonder Woman, Harley Quinn, Solomon Grundy and the Goddamn Batman who now kicks bad guys trough buildings. XD
Plataforms are XBOX 360, Play Station 3 and Nintendo Wii U
Release date yet to be confirmed.