James Gunn shared some interesting details about the growth of Groot throughout the Guardians of the Galaxy franchise and into Avengers: Infinity War.
[WARNING: This post contains spoilers regarding the Avengers: Infinity War trailer from San Diego Comic-Con and D23.]
No matter how Groot (and the rest of the Guardians) evolve between now, Infinity War, and Guardians of the Galaxy Vol. 3, his growth continues to be an interesting development to watch throughout the MCU.
Gunn did not direct Infinity War, but he did serve as an executive producer and Anthony & Joe Russo (Captain America: Civil War) will certainly benefit from his vision.