Mentions when Firefly was first announced by Whedon.
Cast list reveals spoilers.
San but true, director James Gunn confirms the news.
Adam Warlock? Vance Astro? Captain Mal?
Fillion playing Adam Warlock?
Fillion's cameo is very small and fun.
Fillion previously cofirmed a cameo and teases to check the credits.
Watch Fillion's song and dance routine.
Released on July 30th.