Rumor has it that Marvel Studios will be putting out three movies in 2014.
In addition to Captain America: The Winter Soldier and the Guardians of the Galaxy movie, Latino Review has it that Edgar Wright's Ant-Man is slated for 2014 as well.
While I believe Marvel has said they want to do only two movies per year, I don't see why not a third — especially if they want Ant-Man in The Avengers sequel.
Regarding the source of the rumor, Latino Review apparently got into some trouble for leaking information prior to the San Diego Comic-Con, so there's a strong possibility this is true.
And speaking of Comic-Con, test footage of Ant-Man was revealed.