At least, that's when it'll be hitting theaters on this side of the pond. Paramount and Sony plan to release the film in Europe first, as befitting its heritage and fanbase. There's no specific dates set, but they're eying a fall dates of late October and early November depending on what part of Europe you're in. If you're very wealthy, you could hop on a plane and catch it a few weeks early.
Variety also reports that the film will be released in 3-D. I guess that's a sign I've lost track of this project as I wasn't aware that was ever in doubt, but apparently the two studios have been debating that the past few months. Now after viewing dailies, they've decided that 3-D "would offer the best rendition" for the film ... and frankly the recent ginormous 3-D successes like Monsters Vs. Aliens probably helped convince them of that.
So, there you are, Tintin fans: December 23, 2011 in 3-D. Excited?