It'll either be Gracie by Submission or Hughes by Decision. Gracie has taken beatings by far better than Hughes, and is unlikely to be knocked out.
Hughes has the advantage of being the stronger fighter, so he'll definitely be the aggressor, and that'll work in his favour points wise.
Plus everyone thinks Gracie is undefeated. Only in the Octagon, anyone remember the pride bout that was done with Gracie rules, (No time limit) and he ended up having his father throw in the towel on him. Due to a beating at the hands of a drinking, smoking, partyer named Sakuraba.
Either way it'll be fun to watch!
I think Gracie will have to stay active and not get contolled if he want's to win. Hughes needs to fight his fight and not get sucked into Gracie's trickiness.
(Long 2 cents I know, I'm just excited!)