Seems like Cyclops is kind of a mystery from the start. He is the X-Men's leader in the field. That means he gets to deal with all the big threats. Because you know, everyone has a tank just roaming around all over the place.
Back to the actual X-Men villains when you have to fight a sentinal. As you'd expect it's a big dude and fills pretty much the entire screen. And Wolverine can just wail on it since it's not human and thus not covered by decency rules.
Alright maybe we're going for a horseman of the apocalypse thing here. Not that it gets explained that way very well. I don't want to some off as a whiner, but this is the stuff I hate in comic games. Make a story that makes sense, even if it's not accurate.