Even before the movie came out, there was talk of the team from Guardians of the Galaxy joining forces with the Avengers at some point. With the villain Thanos casting an increasingly large shadow over the Marvel Cinematic Universe, it makes sense that the action will move further out into space, and there is a great deal of crossover between the two groups in the comics. It seemed like a natural fit given Marvel’s penchant for connecting each and every property to one another. But Guardians director James Gunn says you shouldn’t expect a team up.
Since the beginning, Gunn has been adamant that his film is its own separate thing, and has even come out and explicitly stated that this title doesn’t exist solely to serve the Avengers films or to set up the coming two-part Infinity Wars saga. While there is an overall homogeneity in the MCU, across titles, casts, and creative teams, Guardians definitely feels more like its own distinct entity than anything the studio has produced thus far.