Equestria Girls: Friendship Games has been floating around on the sidelines for a while now without any kind of release date. Buried in that SDCC Exclusive list earlier was a description revealing a possible month:
Go Team Wondercolts! My Little Pony Equestria Girls are back for a third film in October, which means we’re ALL literally winners! Stop by to get your own Friendship Games button, exclusively from Shout! Factory Kids.
October fits with past releases, and we already know Fall is confirmed. I wonder how big the push will be this year?
Update: Another site actually lists it's TV release for October 13th. No official confirmation yet though.
Thanks to Andrew for pointing it out.