I completely agree

I always thought that the Genosha and Sentinels story would fit perfectly for a film. And what a better way conclude the franchise and Magneto's saga for a human and mutant war. My idea was that the government, knowing that mutants would regain their power, to deliberately give Magneto his own land to govern, and present that to the public as redemption for 'the cure'. While mutants from all over the world go to their promised land, or Genosha, the humans in secret start the Sentenel project, as a means to ensure their own safety, but also to exterminate all the mutants in Genosha.
This story would not only answer and explain all that was left unfinished with the last film, but would also conclude some things like... Magneto realising on his path to war and conflict, was put in the same situation he was as a child, in concentration camps (as the first film began) where Genosha will represent that camp; Xavier returning as a leader of the X-Men; Rogue realizing who she really is and officially becoming a memeber of the team; and Cyclops returning!
I think that a Wolverine sequel will onlyensure one thing: that X-Men as a franchise will never continue after the third film. There will be some smaller projects, like Magneto, First Calss, even Xavier, or Storm... or why not have a Kitty film... that would be really fun and cheap...