They've already announced a Falcon and Winter Solider show as well as Scarlet Witch and Vision. There may be some others as well. Both of those are interesting considering that Vision is still "dead" (although that seems very fixable) and Falcon is going to become Captain America.

I'm guessing the future movies are going to focus more on sequels for the non-original Avengers that have already had movies as well as new characters (Eternals and eventually some version of the Young Avengers i.e. Cassie Lang, Kate Bishop, Kamalah Khan, etc.).