I actually really like this idea. A retooling of Magneto's machine to be time traveling, but making Rogue the only one who's able to use it due to her withstanding it last time. Wolverine would be there in case of anything like last time.
I also would really like an opposite for the character of Magneto for DoFP future he's reinforcing a fence instead of taking it apart to protect himself and allies.
Also possibility would be Rogue being stuck in the past(70's with Gambit?
) so she's not just one of the young-ins again.