I saw a screen shot on instagram. It was saying that
D23 accidentally posted about F! and then deleted it. It said the intended return was just before July 4th, but it will probably be pushed back a little now. Also, stating POC, Aladdin, Lion King, and Tangled being added. Seems similar to the accidental slip of MSEP staying until August 20th. July 4th is the closest thing I've seen to being an actual date other than "summer 2017"