So far we have the following:

Tony x Pepper and Charles x Raven

I'll be Pepper and Charles and you'll be Tony and Raven. We could bring in other roles such as Magneto, Black Widow, Captain America etc down the line. We still need to figure out when this takes place and during which canon events. I would assumed we might do this between either Iron Man 2 and Avengers OR between Avengers and Iron Man 3. As far as the X-Men verse goes, did we want them as young adults or older adults? I was not a big fan of X2 and X3. I have seen Days of Future Past and wasn't too thrilled with it either, so we might want to do something with First Class?