It seems likely that there will be no US male singles skaters at the GPF, or have I forgotten someone?
Richard Dornbush still has a shot,depending on how he does at Trophee Bompard and how others do at NHK.
Richard will be competing against Tatsuki Machida and Maxim Kovtun, who won their first events.
At NHK, Hanyu may or may not compete (silver from Cup of China) and Mura (gold at Skate Canada) and Voronov (silver at Rostelecom Cup) will be there as well.
Right now, Jason Brown is in second with 20 points, with Nam Nguyen behind him in 3rd also with 20 points (Jason won the tiebreaker). Machida and Kovtun will both pass him by finishing at least 5th. Same with Mura at NHK. Hanyu and Voronov will pass him with a 4th place finish or higher for sure, though 5th place will also do it if they have a higher score to win the tiebreaker.
Heck, Jeremy Abbott could do it if he somehow wins NHK and others fare poorly. Second place at NHK, would put him in a tie-break situation with Jason.
Ross Miner and Joshua Farris can't get into GPF, but they can play spoiler with their placements. Ross tends to do well at NHK.
A few scenarios (and this isn't considering Hanyu WDing from NHK:
Let's say TEB placements are Machida, Dornbush, Kovtun, Ten and NHK placements are Hanyu, Mura, Miner/Abbott, Voronov. Dornbush with 24 points (2/3 placement) would pass Voronov with 22 points (2/4 placement)
Let's say the placements at TEB are Machida, Kovtun, Dornbush, Ten and the placements at NHK Hanyu, Mura, Miner, Abbott, Farris, Voronov. Dornbush would actually pass Voronov and Brown for the last spot.
Or the NHK placements are the same but TEB is Machida, Kovtun, Ten, Dornbush. Brown would pass Dornbush (20 points 3/4 placement) and Ten (also 20 points with 3/4 placement) and Voronov (18 points 2/6 placement).
Or the TEB placements are the same and NHK order is Hanyu, Abbott, Mura, Miner, Farris and Voronov. Abbott and Brown would get into a tiebreaker situation. Abbott would have to score 250.41 or higher. His PB is 246.35.
tl;dr: Richard still has a shot and Jason and Jeremy has a really really tiny shot and will need some major alignment of stars.