In an interview with the Nerdist, Captain America: Civil War Screenwriters Christopher Markus and Stephen McFeely have hinted that the next Avengers could include characters from Guardians of the Galaxy:
“Certainly interested in it! It’s very interesting. Let me put it this way. You know who owns that gauntlet, right? And you know who’s in another movie, whose kids are in that movie… You do the math!”
He of course is referencing the fact that one of the guardians ‘Gamora’ played by Zoe Saldana, is the daughter of Avengers: Infinity Wars big bad Thanos. Markus and McFeely work closely with directors The Russo Brothers within the Marvel Cinematic Universe and are
serving as the screen play writers for Avengers:Infinity War, so they obviously know something we don’t. Avengers: Infinity War is the First two-part movie in the Marvel Cinematic Univers (MCU). Part 1 will be the nineteenth movie in the series and part 2 will be the twenty-second. Both films are scheduled to be directed by Anthony and Joe Russo, with screenplays by Christopher Markus & Stephen McFeely,.
Interestingly they have announced that the subtitle will change from Infinity war but have not revealed what it will change to. Part 1 is scheduled to be released on May 4, 2018, and Part 2 is scheduled to be released on May 3, 2019. If you can’t wait that long you could check out Captain America: Civil War, also directed the Russo Brothers and in cinemas now.