Keep in mind James Gunn made it clear the Hulk will not be slotted in the Guardians sequel. So, why do I shortlist this title here?
First of all, the fact the Quinjet landed in the Pacific is not a guarantee Bruce Banner was in it at the moment it crashed-landed near Fiji.
Secondly, James Gunn saying someone will not be in one of his movies and actually appearing in his ventures – well, that’s not unheard of.
So, Guardians of the Galaxy 2 is, in my opinion, a possibility. Though, in truth, Civil War seems much more plausible because of Banner’s strong connection to the Avengers.
Avengers: Infinity Wars

Granted, this possibility seems the most plausible of all. Except for the aforementioned cameo of Bruce Banner in Iron Man 3, his other appearances have only been in the two installments of the Avengers.
So, given the fact Infinity War – Part I and Infinity War – Part II are movies of the Avengers franchise, well, do the math.
