I'm not sure how this would work, maybe he'd be another one of those terrifying miracles like Pietro and Wanda. Maybe it would be the adventures of Cyclops and the Inhumans. Seriously though that would be pretty great. Just think Wolverine stuck over at Fox while Cyke gets to bust out of his shadow.
I'm not sure what Cyclops would work best, there is the classic Cyke who is sort of a more modern Captain America, or the anti hero that has marketable appeal today. I realize separating Cyclops from the X-men is pretty much nonsense, but seriously wtf is Fox's problem? I didn't think much of Mardsen while he played Cyke, but since then on things like 30 rock he's proven to have good range. This current movie is all about time travel, they couldn't have a one line 3 second explanation as to why hes back? Or he just didn't die in the **** movie they should ignore anyway.
And another thing, If you are going to have an X-men movie about sentinels you need to have Cyclops! That is when he gets to cut loose. Seeing as how he can take on 30 in the time it would take Wolverine to kill one, I think it'd be pretty cool.