It turns out the Groot we met during the credits of Guardians of the Galaxy Vol. 2 will be the same version we see in Avengers: Infinity War.
Elaborating on the timeline of Guardians 2 credits scene and Infinity War, Gunn said, “Well, basically those are at the same time.”
When asked about the similarities between the teenaged Groot and how the character appears in the Infinity War D23/Comic-Con footage, Gunn said, “He’s exactly the same.
With an official Avengers: Infinity War trailer likely right around the corner, we should see Groot’s movie form before too long.