Magneto solo movie just sounds weird at this point. First Class already covered his backstory. His role as the mutant leader has already been explored in the OT and the upcoming DoFP. Plus IMO the most interesting aspect of Magneto is his chemistry/tension with Professor X, if you took that away I don't think I'd find the character as compelling. And that has already been explored in the OT, FC and now that in DoFP we'll have both young and old versions of the characters, I don't know if there'll be anything left to explore about that relationship (as much as I love it).
I thought y'all would know!!!
t: