Since we don't have an official reason for Megan Fox no longer being part of TF3, and since no-one really seems to care, I figure we might as well have some fun and see what theories (plausible, stupid, funny or what have you) we can come up with. Try to keep it clean...

My favourite theory of the moment is she's really an Alice-style pretender/Austin Powers style fembot, so Micheal Bay booted her in favour of more screen-time for the humans (well, Shia LaBouef anyway).