James Gunn is already working on Guardians of the Galaxy Vol. 3 and appears to have teased the arrival of Quasar.
Guardians of the Galaxy Vol. 3 is currently being developed and does not have a release date.
One of the five post-credits scenes to Vol. 2 confirmed Adam Warlock will be present, with Gunn also confirming Elizabeth Debicki’s Ayesha will return.
It is expected that all of the Guardians will return, but their visit to Earth could bring more team members on board.