What the sequels might be about

[Na'vi a Kepekmì]

For the better part of a decade, the most fascinating narrative about the Avatar sequels was their release dates. Now that we think that’s settled, director James Cameron has finally begun to reveal what the actual narrative will be about: Family.
[................]

The first of those sequels is still on track for Christmas 2018 but Cameron admitted that he’s okay with changing it again if he must. (It was originally scheduled for release in 2014)
[...]
At the moment, the films are scheduled a few years apart. Avatar 2 will be released Christmas 2018. Avatar 3 will follow on Christmas 2020, Avatar 4 on Christmas 2022 and finally Avatar 5 on Christmas 2023.

We Finally Know What the Avatar Sequels Will Be About

It's supposed to be a good website, but still...