JMM would destroy Bradley. JMM is a level or three above Bradley and it would show in the ring. JMM would win by KO or TKO.
The rematch would make a lot of money but it shouldn't happen immediately. That rematch would take a lot out of Bradley. Instead Bradley should fight Marquez or anyone else. In fact, he should heal up.
Destroy Bradley? I doubt it. I suppose if Bradley fights like he did tonight you're right. Marquez has enough power to do what the Russian did but only worse. That said if Bradley focuses entirely on boxing, I think Bradley has the boxing ability to win. He cannot win against guys who have one punch KO power trying to go blow for blow. Holyfield did the same against big guys and it didn't work.