You make a very good point about Ms. Maximoff's possible encounters. I just rewatched First Class again to celebrate the new movie, and it still cracks me up that the v. v. serious opening speech from Old Charles in X1 is the cheap chat up linie from Young Charles in XMFC. :)

Wanda: that would work with (what I know of) her personality, too. Though meanwhile I've heard that a line of dialogoue established Wanda does exist as a same age twin, the girl Peter is hugging during the montage is a younger sister. (Lorna?)