Collider that James McAvoy had been Universal's choice the play the lead role in At The Mountains of Madness. While Guillermo del Toro had been campaigning to get Tom Cruise in the part. Tom and del Toro had been talking about making a new Van Helsing film before it got axed to make Mountains which was reported by Vulture. There is also word from Deadline that Cruise is aiming for supporting role in the musical Rock of Ages but is still attached to Mountains. Ron Perlman (Hellboy1-2, Blade 2) seems to be the only person currently cast in the film when Guillermo announced to MTV writing a role just for him.
Currently promoting a new film James McAvoy was asked by CinemaBlend about At The Mountains of Madness. He seems to playing it safe not coming out and confirming or denying his involvement.
"I don’t know anything about the story, but he’s an amazing director. I would be very lucky to be able to work with someone like that one day."
Based on the classic science fiction horror story by H.P. Lovecraft. A group of scientists and archaeologists travel to Antartica on an expedition in the early 1920's. There they stumble upon the ancient relics of an abandoned city hitherto completely unknown to mankind and uncover a prehistoric species that is awakened only to wreak havoc on their victims.
It's been a passion project for Guillermo del Toro and has even the caught the attention of long time friend James Cameron who is producing. Guillermo has written the film and will direct now that he's left The Hobbit. It's expected to be shot in 3D and it's effects are sure to be a blend of practical makeup, puppets and CGI. That along with his amazing touch of detail to his sets, characters and monsters it should be another quality horror film.