Avatar 3

• changed the US film release date from December, 2015 to December 18, 2015 121 weeks ago

I am in the process of writing the next two Avatar films now. We are planning to shoot them together and post them together, and we will probably release them not quite back to back, but about a year apart. Christmas ’14 and ’15 is the current plan.” Of course, it’s probably best to take those release dates with a grain of salt, since the first Avatar had several release dates before its December 2009 release.

Source: Entertainment Weekly James Cameron: 'Avatar' sequels coming Christmas 2014 and 2015