Alpha Flight(All of them Beta,Gamma, First Flight and the resent team before they died) with a guess appereance by Wolverine. They take on Master of the World and Omega Flight(All of them but Diamond Lil joins Alpha)
New Mutants/X Force
Assuming you mean the animated movies...
Marvel Team Up, similar to what they did with the Hulk Vs. movie. Just think, Wolverine and Spider-Man in a movie together. Or Hulk and the Thing. Or Iron Fist and Luke Cage. They could even arrange it so that the animated movies are associated with the movies. When Iron Man II comes out, how about a double feature with Iron Man and Spider-Man, and then Iron Man and the Hulk? When the Thor movie comes out, you could do Thor and Hulk, and then Thor and Iron Man. Possibilities are endless.