As with Master and Commander and his best film, Gallipoli, Weir wrote the screenplay for The Way Back himself. He starts shooting the movie in March, in eastern Europe.
I suspect that Weir's selectivity is the key to his fantastic track record. He's a solid, straightforward director, but he really knows how to pick the great stories -- the ones that mean something. (Though I hate Dead Poets Society, so go figure that one out.) Two of his films are among my all-time favorites -- Gallipoli and The Truman Show -- so I'm basically obligated to get excited about anything he does. He does anything rarely enough that it's not too much of a burden.