The first Guardians of the Galaxy Vol. 2 trailer could be coming with the release of Doctor Strange, according to Collider. The movie news site states that Marvel Studios' president Kevin Feige said "it could be attached" to the November 4 film, although he didn't go so far as to confirm it.
Footage from the Guardians sequel was screen during the studios' Hall H presentation at Comic-Con International: San Diego, but writer/director James Gunn has said that the footage was unfinished and wouldn't be released to the public in that form.
Doctor Strange is scheduled to open in theaters November 4, while Guardians of the Galaxy Vol. 2 is dated for May 5, 2017.