Magneto Vs. Doctor Polaris

I think that Magneto holds the distinction for most film appearances by a comic book villain.  X-Men: Apocalypse will mark his 6th time as part of an X-movie.  Lex Luthor is hot on his heels though, with his 5th film appearance coming up - and if rumors of his appearing in Suicide Squad are true, he will have his sixth turn as well. Doctor Polaris is still waiting patiently.