Two observations:
#1 - Context is probably everything for the Magneto image: The helmet fits awkwardly and is clearly a (more comics-accurate as a shout-out) prototype to the one we've seen him wear "later" as an old man, he's PISSED about something, and he's wearing what's evidently the X-Men's "field uniform" under his jacket. Since we know this is a prequel about Magneto and Xavier founding the X-Men and then "breaking up" over ideology, one is given to conclude that what we're looking at is a portion of that "break-up" moment - i.e. "Screw you, Charles! I'm out, and you can't stop me cuz check out my helmet that cancels out your powers!"
#2 - Obviously Prof. X will have hair for most of the movie, so he can lose it in some big dramatic moment and everyone can go "oh, THAT'S how that happened..."
#1 - Context is probably everything for the Magneto image: The helmet fits awkwardly and is clearly a (more comics-accurate as a shout-out) prototype to the one we've seen him wear "later" as an old man, he's PISSED about something, and he's wearing what's evidently the X-Men's "field uniform" under his jacket. Since we know this is a prequel about Magneto and Xavier founding the X-Men and then "breaking up" over ideology, one is given to conclude that what we're looking at is a portion of that "break-up" moment - i.e. "Screw you, Charles! I'm out, and you can't stop me cuz check out my helmet that cancels out your powers!"
#2 - Obviously Prof. X will have hair for most of the movie, so he can lose it in some big dramatic moment and everyone can go "oh, THAT'S how that happened..."