I guess the Thor in-season crossover is dead. LoL
Yeah, I seriously doubt they'd do the full 22 episodes. If they run on Fridays starting on Jan. 5, 2018, the 22nd episode would be June 1, and shows almost never run into June. Unless they have a two-hour finale on May 25?
The Winter Olympics will be Feb. 9 to 25, though, which eats up three Fridays (Feb. 9, 16 and 23). I don't know if ABC would put SHIELD up against that, especially on Feb. 9 when the Games will open. Considering that, maybe ABC doesn't start SHIELD up until March 2 ... if you run one episode per Friday through May 25, that's 13 episodes, the standard size of a TV season that doesn't get a "back nine." Kinda makes some sense. Waiting 9½ months for a new episode would suck, though...
[edit] Oh, the editor at The Hollywood Reporter says SHIELD is getting 22 episodes:
https://twitter.com/Snoodit/status/864514521691443200
I think maybe they'll have a two-hour premiere on Jan. 5, skip Feb. 9, and have a two-hour finale on May 25. That gives you 22 episodes.