The biggest difference between this season and the coming season is that Hanyu-kun and Shoma will be in a different seed, the seed for 1st to 3rd and another for 4th to 6th. This season, Hanyu-kun and Shoma were in the same seed, so only one was assigned to NHK (which Shoma got) and Japan had 2 home picks (Sota and Sato. H this season), but the next season, there is a high chance that both of them get NHK. (I have no idea how high the chance is and how it is decided.) In that case, there will be only 1 Home pick for Japan, and JSF most likely wants to keep one for Sota as long as he stays healthy.
I think Tomono-kun will have 2 spots himself by his stats alright, but JUST IN CASE IF NOT, and if he podiums in the only one assignment he participates, then the home pick would go to him for his potential GPF entry. That's the only scenario (that I can think of) for him to be assigned at NHK.
Buuuut, just let me repeat, I'm no expert and it's just my amateur guess!