I think this is our first look at Cosmo in the Guardians of the Galaxy movie.
James Gunn posted the image on his Facebook page for National Dog Day.
In the comics, Cosmo is actually an intelligent telekinetic Russian canine cosmonaut who is the security chief of Knowhere.
In honor of #NationalDogDay here's a photo of me and my 2nd favorite dog in the universe. #cosmo #guardiansofthegalaxy