Avatar: Collector's Edition is a home release of Avatar released on December 19, 2023.
It can be seen as a more definitive version of Avatar: Ultimate Collector's Edition, despite the "Ultimate" in the title.
It is a four-disc set. The first disc is 4K and contains three different versions of the film (theatrical, special and extended) and the viewer may select the version which will add/remove the scenes depending on the version selected. What is different about all three of these versions, however, is that they now all feature the new scene of Parker Selfridge saying, "You know this isn't over?" in the ending.
The second disc is the same, but is in standard 1080P.
Disc three and four are both dedicated to bonus features.