Re: How many more movies would you like with >Original Cast<?
I think they'll build up the X-Men brand again, which is the life-blood obviously, and use that as a vehicle to introduce new characters to the GA. Then hopefully spin off different series from there (like they tried and failed with Origins).
Competing with Marvel Studios is the name of the game, thats Hollywood. They have this potentially great universe at their disposal, so they'd be smart to try and mine it.
Before Stan, Claremont & Miller there was Roger.