Originally Posted by Human Torch
I would'nt say it's incompatible,but it's a moot point since a "shared" universe is very unlikely.
Incompatible is exactly the situation. Vast swathes of plot in the X-Men movies simply cannot happen in the setting as detailed in the MCU. There's severe differences ranging from fundamental tone to the structure of government. To try and force them together would be an even worse fit than the X-comics are in the larger Marvel comics setting.