>alpha centauri is three star systems "close" to each other
>pandora is in alpha centuari a
So since humans have near light speed travel, will the sequels show alpha centauri b and proxima centauri colonies? Surely humans have to have been to even Sirius by now.

Cameron already said all the planned movies will focus on Pandora. He hinted that there would be more room for other movies because of the other planets around the other two stars. But the current batch of movies wont ever go there