As for Wolverine, I agree he isn't *necessary*. Really very few individuals could possibly ever be considered necessary. Arguably Scott is the most necessary X-man imaginable and we've already had a decent X-Men movie without him.
See, I'm mad about what the FoX-Men movies did to Cyclops...though I understand why.
At the time the first FoX-Men movies were written and made, Cyclops hadn't been a relevant or important character in about 15 years in the comics. From the Mid-80s and ALL of the 90s, no one knew what to do with him. He had no major storylines on his own or major character arcs, everything big he was in was tied to the 90s Fad characters like Cable and his roles were tied to them rather than himself. He was basically just relegated to "Hardass Leader guy who clashes with Wolverine a lot" and nothing else.
It wasn't until the early to mid 2000s when new writers came on like Grant Morrison and Joss Whedon that he started getting prominence again, with his own storylines and character arcs. This was also when most of the 90s Fad characters' wore out their welcome and they were sidelined, and Wolverine was tossed onto the Avengers and out of the X-Books. And by then the first FoX-Men Trilogy was done so it was too late to do anything.
Meaning if Cyclops gets adapted now, they'll have 20 years of much better storylines involving him to use.