Blu-ray 3D Collector's Edition will debut globally October 15th, and release in North America October 16th.
James Cameron himself made the announcement today, via Avatar's Facebook page. Check out the video
Previously only available to consumers through an exclusive deal with Panasonic, the two-disc AVATAR 3D Blu-ray Collector's Edition will feature the original theatrical release and be available in all-new collectible packaging.
source1 source2 source3 with press release from Twentieth Century Fox Home Entertainment
In November 2010 there was a extended Blu-ray collector's edition Blu-ray release with all of these special features.
Here is the older 2010 related threads:
"Avatar" Blu-ray/DVD thread
Avatar 3D worth the extra money?
This release is sure to sell well in the 3D genre for Q4. For the rest of us I don't think it really matters if you don't own a 3D Blu-ray player. I think it will be a minimal amount of new hardware purchases for this release.