Of course, James Gunn would be the one to establish himself as the main creative behind the Guardians of the Galaxy films, with a distinct personal connection to the Marvel Comics material. Colin Trevorrow is still part of a Chris Pratt-led trilogy with Jurassic World. So everything worked out nicely! It is interesting to hear he was in the running for the Guardians films, per his words to The Empire Film Podcast.
Article source: https://www.cinemablend.com/news/2480457/jurassic-worlds-colin-trevorrow-explains-why-he-didnt-want-to-direct-guardians-of-the-galaxy