Where is NOVA? That would be the best character
Most of the Guardians are fillers... b-grade characters with very insipid powers.
Where is NOVA? He was the real deal.
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The X-Men timeline was altered 2 times, not just one (DOFP).
FIRST CLASS was already a "divergence".
Everything is explained here:
THE X-MEN CINEMATIC TIMELINES
http://x-continuity.blogspot.com