Now we know why Josh Brolin wasn't interested in playing Batman. He may have had something else in his mind !
Thanos first appeared in the mid-credits scene of The Avengers (a motion-capture performance by Damion Poitier). It has since been hinted that Thanos is acting as an over-arching villain whose machinations and presence will be felt all throughout the Marvel Cinematic Universe– especially in a film like Guardians of the Galaxy, which introduces Marvel’s cosmic characters and plot-lines
The rumor first appeared in Latino Review and it is now confirmed by Variety. I for once think it is a great choice. Brolin will bring a much needed sense of gravitas to this role.