Hope it's okay to DP since it's been a while since the last post on here.
According to this article
‘Marvel’s Inhumans’ on ABC Gets September 29 Premiere Date | TVLine, Inhumans is getting a 2 hour premiere on Friday, Sept 29 at 8 pm, which is normally when Once would be starting back. So I'm guessing we'll be waiting until October for a premiere this year. It makes me nervous that ABC is already bumping us in favor of other shows. I really hope we still get our full 22 episodes for this season.
ETA: I realized after I posted this news is not a spoiler. I have no idea why I posted it on this thread. Sorry!