That's a pretty tall order since most Marvel comics, in my drunken opinion, aren't on the level of Winter Soldier.
I get what you're saying though. The X-men is sort of its own universe, so while some crossovers can work, say a Wolvie/Cap crossover, if the story is good, but we don't need movies where Thor fight Magneto or Iron Man teams up with the X-men.
What's more important is that we get good solid X-character stories. There is so much potential.
Actually, since I am assuming Fox owns the rights to Silver Surfer, I want a really good Silver Surfer movie with cosmic goodness and Galactus!