Kevin Feige recently confirmed that Marvel's Phase 4 plans won't become known until after Spider-Man: Far From Home is released, and it sounds like the Disney+ TV shows will play a significant role in that. Loki and The Vision & Scarlet Witch are seemingly coming to the online streaming service first but a series revolving around Bucky and The Falcon is also in the works.
Now, Feige has confirmed that these shows are being developed as part of the "post-[Avengers: Endgame] MCU" before revealing that the "transformations" characters go through will have an impact on what we see in the movies.
"It will be MCU proper. Sometimes it will take place as Captain Marvel did in a time before current events, sometimes it will take place during. What I will say, whatever happens in those, in those shows and with characters that have been in the films, they’ll undergo transformations, not Loki necessarily, but will undergo transformations in their series and those transformations will be reflected in their next film appearances because we’ve been developing long form narrative stories for Disney plus at the exact same time that we’ve been developing a post-[Avengers: Endgame] MCU, we’ve been able to do something we’ve never done before, which is interweave them from the start, from the plant."
While past MCU TV shows have taken place in the same world as the movies, the connections have been tenuous and nothing that's happened in them has had any sort of real impact on the big screen adventures of Earth's Mightiest Heroes (nothing Agent Coulson and his fellow Agents of S.H.I.E.L.D. have done has never even been vaguely alluded to).
It's also interesting to wonder what these "transformations" could be. Will The Vision take on a new form and could Bucky and The Falcon be competing for the right to become Captain America?
Time will tell, but more details are expected to be revealed at a Disney+ press event later this year.