Just found this article about Sanctums release. Looks like they have pushed it back to March 2011.

Jim here. Universal has set a release date for JAMES CAMERON PRESENTS SANCTUM 3D: Friday, March 4, 2011 (via Deadline).

The timing puts the diving thriller up against Sony’s PRIEST which will also be in 3D. PRIEST recently had its release date changed from January 14, 2011.

Based on true events, this adventure drama concerns a father and son who are trapped in an underwater cave with a team of divers as the group strives to stay alive against all hope.

Obviously the world is watching this movie as it is the first officially “touched” project from James Cameron since AVATAR, even though he is only producing. Should be a heckuva ride.

Source: MarketSaw