Nathan Fillion is set to make another cameo in James Gunn's Guardians of the Galaxy Vol. 2. As you know, he made an uncredited cameo in the first movie as a big alien prison inmate who roughs up Star-Lord and gives him a hard time. He has a new part in the upcoming film, and if you don't want to know what it is, stop reading now.
Some photos from the set of the film were recently posted by Comicbook.com and there's a movie theater on the set, so it seems the movie will also have some scenes set on Earth. The movie posters outside of the theater feature a series of movies featuring an actor that is played by Fillion in various movie character roles. One of those movies looks like a Tony Stark biopic. That tells us this is most likely set on a present-day Earth.
So who is this actor that Fillion is playing? Well, all these movie posters are being used to advertise a film festival celebrating the work of an actor named Simon Williams. That's who Fillion is playing, and Williams is the alter-ego of a Marvel superhero named Wonder Man! How cool is that!? Here's some information on the character for those of you who aren't familiar:
Simon Williams was made into a being of pure ionic energy by Baron Zemo and became the impossibly powerful Wonder Man. Meant to aid the Masters of Evil in their campaign against the Avengers, Wonder Man instead found himself sympathizing with the heroes and joined their team instead. He has remained an Avengers mainstay ever since, despite his constant insecurities and battles with his own mortality.
I seriously doubt there will be more to the character in the film than these posters. This is probably just a cool little Easter egg thrown into the film, but it would be awesome if it turned out to be a little more than that. Check out the photos from the set below.