Sanctum is inspired by a real experience that producer Andrew Wight went through, where he ended up trapped with 14 other people in a cave system for two days. The story involves a father and son who experience a life-threatening crises during an expedition to the unexplored and least accessible cave system in the world. Sanctum is being directed by Australian filmmaker and Tropfest winner Alister Grierson and features an Aussie cast including: Rhys Wakefield (7's "Home and Away"), Allison Cratchley (7's "All Saints"), Richard Roxburgh ( Van Helsing), Alice Parkinson ( X-Men Origins: Wolverine) and Daniel Wyllie ( Animal Kingdom). The reason Cameron is down in Australia (which is where that photo comes from) is because that's where they're going to be shooting soon. Cameron traveled down to Australia's Gold Coast recently and the Brisbane Times (via MarketSaw) published an update with some quotes from Cameron. Not only is it a more intimate and much smaller project than Avatar, but it's Cameron's chance to prove that 3-D can be used well in movies that aren't big blockbusters (but hopefully not for films like Precious).
In fact, Cameron is already preparing a new underwater 3-D drama called Sanctum, which you may have heard about. Although you may think that James Cameron is settling down and taking time off after finishing his 10 year journey on Avatar, that's not the case.