Navin
MALDREAD
I don't think we are getting a post kalos league arc, XYZ and the Flare arc is extending the main arc right now, I'm waiting for their plans gamewise to make a better guess but yeah not expecting anything.
Well if Gen 7 begins hypothetically fall of 2017, that leaves approximately 90 episodes left (XY will have covered 91 episodes + several specials since it started two years ago) in the series after the gym episode (XY093). That's actually a lot of episodes left. There may not be a BF length post-league arc (that was 60 episodes in AG), but a DA length (that was 20 episodes in BW) is certainly in the ropes.