Rebel1one1 said:

I just don't want to see the theatrical cut Avatar disappear when these new cuts are released. The original cut must always remain an option. It all goes back to that quote Cameron said about Lucas... As long as Cameron doesn't disown the theatrical cut of Avatar he has a right to be critical of George's creative decisions..

There's no chance of that happening. Cameron has stated that the theatrical cut is the director's cut, it's his cut of the film. Any extended version, he's said will be "fan cuts", in that they're being extended purely so the fans can see more of the film.

Plus, he's done multiple versions of films before, and the original has never disappeared.