It's mainly the elbows from mount
Gus should prepare for,I asked him over twitter if he trained with Werdum,the man with the best guard in mma,but he did not answer me.
At this time of his carreer,I don't think Jon is unpredictable .His major moves are as follows:
The spinning back fist,the standing elbows,the oblique kick to the knees,occasional flying knees and the most dangerous of all his arsenal is the elbows from mount.If Gus can negate the latter,his chances of winning will grow exponentially and especially if he can capitalize on the slightest mistake Jones might make because he makes very few.
Setting camp in the US was a good start for Alex,simply because of the availibility of quality wrestlers and other mma fighters.