A super heavyweight division would be borderline a freakshow fight every time. And you could probably see the positive roid tests from space after every fight. It would probably be a nightmare. A lot of people point to monsters like Brian Shaw, etc, and how they would wreck the UFC. Those guys are on ridiculous roid cycles constantly; if there's even remotely reasonable testing it would just be constant overturns due to failed tests.
I'd watch for sure. No idea what they can do with heavyweight. Strong, capable fighters that are 265? That pool is incredibly small compared to other weight divisions, I'd wager.