Battle Of The Atom (2013)
With the time-displaced teenage X-Men running around, things were bound to get complicated, and in the crossover Battle Of The Atom storyline, we saw yet another dystopian future drop in for tea. A group of X-Men from the future, including Kitty Pryde, Deadpool, the Beast and Xorn come back to send the X-teens back to their original time to save the fabric of the universe. Magik, along with the teen Iceman and the teen Beast, travels forward in time to check out their future for herself.
She discovers that the future X-Men aren't X-Men at all, but rather the new Brotherhood of Evil Mutants. There is a future X-Men (led by Colossus with an enormous handlebar mustache) and they're not cool with all the time tampering. Things aren't completely dystopian in this timeline – Dazzler was elected President (yay!) but then assassinated (boo!) – but at least Sentinels aren't killing everybody. That is, until the end of the crossover, which sees Sentinels that S.H.I.E.L.D. were building in secret activated to kill all mutants. Won't we ever learn?