Marvel Studios President Kevin Feige told IGN that there is a five-year plan "fleshed out" for the Marvel Cinematic Universe.
According to Business Insider, he also said that plans will be revealed after "Spider-Man: Far From Home" is released in July.
We have built and fleshed out our five-year plan of where we're heading,
the first few years of which we'll be announcing, as I said, relatively soon, after these next two movies.