Suggesting the Castle star doesn’t have anything better to do these days than make cameo appearances in stuff nerds like, Nathan Fillion recently hinted that he might be showing up in Marvel’s upcoming Guardians Of The Galaxy film. Though, by “hinted,” we mean he basically came right out and said he is. As reported by Coming Soon, a fan took an opportunity during a panel at the St. Louis Comic Con to ask Fillion if he had wanted to get a part in Guardians Of The Galaxy, given his relationship with director James Gunn (for whom he’d appeared in Super and Slither). Fillion, ever the rogue, responded with: “Wanted to get a part? Or maybe did. I'm just saying maybe. Maybe it'll be a surprise. Maybe check the credits of the movie when you watch it.”