No, this isn't one of those speculation articles with a misleading title. This is not a rumor. This is not a prank. This is REAL NOT FAKE. And it is AWESOME!
At Marvel's live event today at the El Capitan Theatre, the full title of the third Captain America movie was revealed. It will be called: Captain America: The Civil War. Here is the movie's logo:
Ladies, gentlemen, Civil War has arrived...
However, at the event Feige also added that the Civil War will play out differently than in the comics. This is most likely the result of Disney not owning the rights to every Marvel character.
This announcement isn't exactly a surprise, but it sure is a massive one.
Update: According to comminsoon.net, Kevin Feige confirmed the following:
Civil War will be the following global superhuman registration with a specific inciting incident