Re: How many active heavyweights would you back to beat Jon Jones?
Jones has the skills and the physical attributes to make any fight competitive.
He hasn't shown any vulnerabilities that anyone at HW would be able to exploit, with the possible exception of possibly maybe his striking, as his reach advantage would be diminished somewhat (but he'd still have a longer reach than everyone).
Probably the only guys I'd really back to beat him would be JDS and Cain, as they both have similar levels of athleticism and explosiveness, they're big, fast and powerful guys. Overeem, Carwin, Cormier, Kharitonov would all have the chance to land some bombs and shake him up. Mir, Silva, Barnett, Werdum could give him some issues on the ground. Fedor is Fedor.
I still don't think I'd want money on the line in any of those fights.