It's been rumored that Jason Momoa is in talks to play the Martian Manhunter possibly for Batman Vs. Superman or the Justice League movie.
However, a new batch of rumors surrounding Batman Vs. Superman have hit the net which states that Martian Manhunter and Aquaman won't be a part of the movie, perhaps quelling fans' hopes (or fears) that the movie will actually be Justice League.
The fan site, Batman on Film states neither character will be in the movie.
Of course, it could very well be that Martian Manhunter is actually in the movie as lots of sites were also told no Wonder Woman, which we know isn't true as Gal Gadot has been announced to be playing the character in Batman Vs. Superman.
The article further goes into lots of speculation, but offers that Batman Vs. Superman will essentially be a Superman movie, with Superman villains, but will be introducing Batman and Wonder Woman.
"Batman Vs. Superman" has a July 17, 2015 release directed by Zack Snyder starring Ben Affleck, Henry Cavill and Gal Gadot.
For more news head on over to the Cosmic Book News Batman Vs. Superman movie hub.