Marvel used their movies to build up to the big confrontation in Avengers Infinity War. They teased Thanos here and there throughout their other movies so that when he made his big appearance in Infinity War, most people already knew all about him and what a big threat he is.
We are hoping that Marvel starts building up to another of their epic stories after the Thanos situation is resolved in Avengers Infinity War part 2. They have plenty of great line wide story arcs that would translate nicely to the big screen. Another thing we are hoping for is to start seeing more crossover between the movies and TV shows. Cross your fingers!