Guardians of the Galaxy Vol. 2 Reveals Nathan Fillion's Amazing New CameoJames Whitbrook4/25/16 1:35pm21537EditPromoteDismissUndismissHideGo to permalinkNathan Fillion is circling the Marvel universe once more. in the most delightful way. New set pictures from GotG2 have hit the web, revealing an all-new role the Castle and Firefly star plays in the movie—and it has a major reference to the comics. Spoilers ahead!