Microsoft has accidentally revealed the existence of Halo 4 via its E3 Press Conference website.
The publisher revealed—by accident—that Halo 4 is in development and that it is "on the way," with a small screenshot of the game that we speculated would be announced at E3.
Update: The image above could be seen on the official Xbox website for a few moments before it was promptly removed.
Update #2: Check out the E3 Teaser Trailer below.