There’s no reason Krakoa can’t “end.” It could be destroyed by an outside force, the nation could simply fail or it could turn on the mutants forcing them to leave. How or if we get to the end is up to Hickman and the rest. As far as the movies are concerned I don’t see the MCU starting with the whole immortal quiet council angle but maybe the mansion resides on Krakoa instead of Westchester. I have faith in the MCU. They made Iron Man an A lister and took the Guardians of the Galaxy and made them popular as well. I think we’ll get some good stuff from the X-Men corner of the MCU.