Avengers - Unity Division

In the aftermath of the war between the Avengers and the X-Men, Captain America decided to be more proactive in defending mutant rights in general and the role of the X-Men as heroes in particular. The Avengers Unity Division was designed to bridge the gap by bringing long term, well-respected Avengers together with equally veteran X-Men, as a symbol of mutual respect and cooperation.

...Well, they came together.

Members otherwise unrelated to the X-Men include Captain America (Rogers), Captain America (Wilson), Thor Odinson, Wonder Man, Wasp, Doctor Voodoo, Vision, Human Torch, and Synapse.