So with the "At the Mountains of Madness" being postponed indefinitely, the most anticipated movie for me in the future years (together with Prometheus and The Hobbit) is the adaptation of Stephen King's great novels - The Dark Tower.
This will be a huge project which will feature 3 movies and several TV seasons. I've heard from some friends of mine that they are putting a huge effort about the visuals of the movie which will be supported by a big budged.
These will be the movies to watch out in the next years. If done right this trilogy can be a milestone in the movie making. The fact that Ron Howard is directing and Goldsman is writer is really promising. King's books are outstanding and they are a must read for all sci - fi fans. Some consider them very strange but I love them. It'll be very interesting to see them on the big screen.
Here is an article about the project from last year: