Re: Question about characters
So far, Wanda and Pietro are the only ones we know who exist in a legal limbo, that likely only came about when Fox/Singer wasn't sure he wanted to introduce them into the X-Men movies way back when. There's still a possibility that there might be some other "floaters" out there that can legally dual-exist in separate movie universes, but we haven't heard of them yet.
THE COTTON AVENGERS
...They move like slick cotton on oil.