well, what ifs are not cannon and the 616 helmet can still be ripped with tk and energy blasts such as lightning apparently. As paranoid strategists and would be world conquerors I think it's safe to assume Exodus and Magneto are up to date on their info on relevant superhumans, particularly the ones connected to themselves or the x-men. chuck and mags are too bosom buddies and have likely shared lots of stories about their lifes.