NHK is going to be the major decider of the Men's event, since only Plushenko and Weiss are sure for the Final.
If Abt's stamina is a problem, two competitions back-to-back plus major jetlag won't help him at all.
I also agree that Joubert is a key player. Last season, he won gold at Skate America, then had a bad skate in Paris. This season, he won silver in his first event, and fumbled in Paris again. He had only two events last year, but he skated well enough in the Final to finish 3rd to Plushenko and Klimkin, ahead of Abt in 4th. If he wins silver, he gets 14 points, putting him ahead of Van Der Perren and Goebel.
The biggest upset would happen if Abt wins gold, Joubert silver, Honda bronze and Buttle 4th. Then the final would be Plushenko, Weiss, Abt, Honda, Buttle, Joubert. Van Der Perren and Goebel would be out.