I’m glad you asked. You see Marvel doesn’t own the cinematic rights of the X-Men, but the characters Scarlet Witch and Quicksilver are allowed to be used by both companies due to their ties to both the Avengers and the X-Men. Problem is, as I said in the notes, Quicksilver never appears in the Days of Future Past comic line. And it is clear that Fox, the owners of the X-Men movie license, are just attempting to confuse audiences by shoving Quicksilver into the movie. Where as the Avengers: Age of Ultron version of the character is not only more accurate to the character in ability, but also in appearance.

If you have anymore questions feel free to ask.

Eh, after a quick read read of Quicksilver's Wikipedia page… it can't get much worse than anything that happened beforehand.

Plus I don't care if it puts me into a minority, but the new Quicksilver can't be worse than this