It's looking very like Johnson backed Leave in order to raise his profile, become the 'voice of the people' and be the injured party when Leave lost.
He then needed a new plan when Leave won.
Standing for PM now is a poison chalice but letting someone else do the dirty work now, waiting for it to all go wrong and him waltzing in in a few years isn't beyond the realm of possibility.
I get the feeling we're all being played here. The media is making Boris out to be the injured party which suits him, Gove is running but maybe they're hoping May wins then neither of them have to face the fact the the Leaver voters aren't going to get what they wanted.
Just a thought......