So last week has been filled with several rumours of Nathan’s cameo role in Guardians of the Galaxy. First it was rumoured to be “Nova” which was shortly dismissed by the director and then it was “Cosmo” which Nathan took to twitter a few days ago to debunk as well. Stay tuned for the movie to see which role Nathan really has!
With so much inaccurate "news" about my involvement in GOTG, I'm actually losing faith in the internet. I'm not Cosmo.
— Nathan Fillion (@NathanFillion) June 26, 2014