If ever there was a method for the MCU to embrace the X-Males cinematic previous as canon, this might be it. Whereas the occasions of the flicks would not exist within the MCU, they'd serve a function in educating the mutants of the current, and perhaps save us the painful means of re-living the origin of characters we're all effectively conversant in at this level. Plus, the mutants would already be within the MCU, simply apparently hiding because of the points they've had with humanity up to now. You may't be pushed to extinction if humanity would not know you exist, proper?