What if...

Bigfoot gets to fight Cain, somehow gets on top of him and pounds him out to become the new heavyweight champion. Remember, Big Foot beat Fedor and despite Fedors declining stock such a feat of strength should not be taken lightly.

Meanwhile, the long awaited grudge match (one that makes perfect sense) between Overeem and Dos Santos gets set up. Overeem effectively knees Dos Santos in the solar plexus, calling out Big Foot in the post fight interview (and later fist pumping his way to the locker room set to the tune of Swedish House Mafia's 'Greyhound')

The UFC then sets up the rematch between Big Foot silva and Overeem, making IT the biggest grudge match in the heavyweight division after the way the last fight ended.

This time Overeem comes in fully focused and gives Silva the beating of his lifetime.

Plausible?

Epilogue: Overeem fails the drug test and is stripped of the title. Chael Sonnen moves up a weight class and faces Randy Couture for the vacated title.