"We will bath the starways in your blood!" Celebrate the expansion of the Marvel Cinematic Universe with Guardians of the Galaxy, in theaters starting today, as Marvel unveils an exclusive look back at the first two phases of the MCU previously shown at Hall H during San Diego Comic-Con!

This 6-minute video features footage from all of the Marvel Cinematic Universe: Phase One movies, Iron Man, The Incredible Hulk, Iron Man 2, Thor, Captain America: The First Avenger and Marvel's The Avengers, along with Marvel Cinematic Universe: Phase Two adventures Iron Man 3, Thor: The Dark World, Captain America: The Winter Soldier, this weekend's Guardians of the Galaxy and even a sneak peek at next year's Avengers: Age of Ultron. It all ends with a tease of Thanos' arrival.

Last week, Marvel Studios finally confirmed that Josh Brolin is playing Thanos in Guardians of the Galaxy and beyond, but it isn't quite clear when he will pop up next. When do you think we should see the Mad Titan next? Chime in with your thoughts below.