Originally Posted by Majik1387
True, but I'm sure he'd want as close to a back up plan as possible, like wherever his lair would be, he doesn't want Xavier looking it up; Magneto is protected by his helmet, but his Brotherhood isn't.
another solid point to take into account.
Eric is the type of character to help others with personal intentions, so they HAVE to work together to build cerebro.
And another interesting point:
Magneto have a telepath on his team now, and he could want to gain new members in the near future, so with Emma and Mystique on the brotherhood, they could have plans with Cerebro, dont you think?