At the beginning of the Iron Man 3 panel at San Diego Comic-Con 2012, Marvel president Kevin Feige revealed the official titles, release dates, and logos for some of the Marvel Studios’ upcoming titles.
Feige revealed that the titles and release dates for Thor 2 and Captain America 2 would be Thor: The Dark World, arriving in theaters on November 8, 2013, and Captain America: The Winter Soldier, which will be released on April 4, 2014. [Update - see title cards here below.]
It was also confirmed that Guardians of the Galaxy would hit theaters on August 1, 2014, accompanied by the title card you see above.
Marvel also shared goodies from Iron Man 3 and a super special early peek at Edgar Wright’s Ant-Man—stay tuned for those!