According to ComicBook.com on Friday, a question was asked of director of "Guardians of the Galaxy's" James Gunn. It was pondered whether or not the Avengers would likely crossover in a film along with members of the Guardians. The film is rather set to overwhelm the box office with its' figures and a sequel wouldn't come as a surprise even if unannounced.
Already, a tie-in was made apparent into the cosmic universe from Joss Whedon's "Avengers" film as the Mad Titan Thanos himself grins at the end of the film and now makes his appearance by "Goonies" and "Jonah Hex's" actor Josh Brolin in "Guardians of the Galaxy." In the comic book series, there's already Tony Stark joining the cosmic team of Rocket, Drax, Gamora, Groot, and Peter Jason Quill, so it would make sense if something of such an encounter were to occur in the Marvel Cinematic Universe.
Gunn had this to proclaim in regards to a possibility of a crossover:
“We talked about all sorts of possibilities [for a crossover] and I kind of know what the basic plan is. That could or could not include a couple of Avengers and a couple of Guardians meeting up, or all of the Avengers and all of the Guardians. But we do inhabit the same universe and they’re pretty big personalities that are likely to, at some point or another, run into each other.”
On the other hand, "Thor: The Dark World's" Chris Hemsworth and "Captain America: The Winter Soldier's" Chris Evans did have much enthusiasm for the Gunn film. Hemsworth did mention that the Avengers team could take on the Guardians in a throw down, but he did follow up with great praise to "Guardians of the Galaxy" after he had seen it.
"We'd win. I have to say that because it's my team, but I saw Guardians of the Galaxy and I think it could be my favorite Marvel film. It's incredible! I love it -- so funny, so funny."
The movies do tend to have end credit scenes that tie the movies together, so there would be no real reason not to actually turn some of the tie-ins into actual character crossover encounters. Currently, "Guardians of the Galaxy" is showing in theaters now and "Avengers: Age of Ultron" will be making its' debut come May 1, 2015. Also, "Guardians of the Galaxy 2" has been announced for July 28, 2017.