The Guardians of the Galaxy franchise has made a point to have Peter Quill be the only Earthling, but that could change in Guardians of the Galaxy Vol. 3.
Ever since he was abducted from Earth in the ’80s, Quill has been one of the only Earth-based characters to venture into the cosmos.
Either way, this just further expands the cosmic realm and could indicate the arrival of a few fan favorite characters.
Gunn is already working on crafting Vol. 3 and has a general idea for what it will entail.