Jason Momoa from Game of Thrones to join Batman VS Superman

Reports are in that Jason Momoa ("Game of Thrones") is in negotiations to join Zack Snyder's upcoming Batman vs. Superman film..

There are rumors that Momoa may play  the Kryptonian killing machine Doomsday, one of the film's primary villains, but another option they suggest is J'onn J'onzz  one of the key members of the Justice League may also make an appearance in the film...This should then pave the way for the long-awaited, long-talked about Justice League film.