Spoilers!
For comics fans, the future of what happens next is no surprise. Throughout its history, The Avengers roster would change from time to time or when a new writer would take over. So, we will see some more development of characters in solo movies, then the next big Avengers film with new characters replacing the old on the roster: Falcon/cap, Bucky(hopefully), Black Panther, Dr. Strange, Cpt Marvel, Valkyrie, Ant Man and Wasp. Question is will they keep Hulk and will they keep Thor after Guardians 3. Although, I could definitely take a pass on Captain Marvel. That actress and character have zero charisma or personality.