Not only did Vin Diesel tease Black Bolt (and maybe Adam Warlock), but in a recent interview Vin Diesel said he wants to see Gigantic Groot in Guardians of the Galaxy 2.
While Guardians of the Galaxy ended with the dancing baby Groot, obviously since Groot is plant-based, he can grow to the full size of a tree.
"I've talked to James Gunn about that. I can't give it away but I would love to see gigantic Groot," Vin Diesel told IGN. "I'd love to throw him into a forest and see how much mass that he consumes after devouring all the trees.
"Imagine throwing him into Central Park in New York City. I just want to see Giant Groot," he said.
Guardians of the Galaxy 2 has a May 5, 2017 release.
Watch: Dancing Baby Groot From Guardians of the Galaxy: