US-ENTERTAINMENT-DISNEYIt was just a matter of time until Nathan Fillion popped up in a "Guardians of the Galaxy" movie. He and director James Gunn are friends who have collaborated numerous times. And while he had a voice cameo in the first film, he's set to make a bigger appearance in the sequel. Thanks to an eagle-eyed fan in Atlanta, speculation is pointing to Fillion playing Wonder Man.

Photos from the set show movie posters from a Simon Williams Film Festival. Simon Williams is also Wonder Man, a former superhero who gives up the game to become a Hollywood star. The posters feature Fillion in fictional movies like "Haxan 2," Oh, Rebecca!" and a Tony Stark biopic.A Tony Stark biopic indicates these scenes take place on present-day Earth (or slightly in the future), and not as a flashback to Peter Quill's (Chris Pratt) childhood. A local video shows that filming from the film festival includes some kind of spacecraft wreck, which could mean that some of the action in "Guardians of the Galaxy 2" returns to Earth.

The question remains: Will Fillion himself appear in the movie? Or are these posters the extent of his cameo?

"Guardians of the Galaxy Vol. 2" opens May 5, 2017.

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