UPDATE 5/30/2014 1:18 PM PT: Variety has posted a report citing its own sources that Brolin has been cast as Thanos. However, there is still currently no confirmation from Marvel Studios.
Since his appearance in the post-credits scene of Marvel Studios' "The Avengers," fans have been wondering when they might see Thanos again in the studio's Cinematic Universe. While reports certainly indicate he'll show up in "Guardians of the Galaxy," there was no name to put with the face. However, an unconfirmed report from Latino Review states that Marvel has cast Josh Brolin in the role of the Mad Titan.
It is widely believed that Thanos is the mystery villain on a rocket-powered throne referred to in Businessweek's profile on studio head Kevin Feige. The character was played in his split-second appearance at the end of "The Avengers" by Damion Poitier, but if the rumor is true, it looks like Marvel decided to bring someone else into the role. Brolin has had a good amount of experience with genre film, playing the lead role in Spike Lee's "Oldboy," a young Tommy Lee Jones in "Men in Black 3" and Dwight in the upcoming "Sin City: A Dame to Kill For."
If accurate, Brolin's casting would be the latest big piece of casting news from the Marvel Cinematic Universe, with Charlie Cox's casting as Matt Murdock/Daredevil announced earlier this week.
"Guardians of the Galaxy" is set to hit theaters August 1.