I want to see the moment where Cable calls Jean "Mom".
Hank replaced the original X-Men with dopplegangers before taking them out of time.
Hank plans on eventually wiping the original X-Men's memories and returning them at some point.
Hank collected the original X-Men from a parallel time line that is not the 616 continuity and doesn't have to return them, and their removal has no effect on the 616 present.