Electronic Arts didn’t mean to release the trailer this early and the original TitanFall 2 trailer was taken down as Respawn Entertainments founder Vince Zampella confirmed on twitter.
The trailer announcement was actually made by mistake and was set to be revealed at a later date.
The leak came during the Pre-show testing of Electronic Arts conference at E3 and as the official trailer was not published where a YouTube user was able to capture the footage from the leak before it was taken down by EA.
After seeing that the trailer had already been leaked and a copy was made, EA reposted the trailer and is now just going with it.
The Trailer reveals new aspects of the Titan Fall universe and hopefully the single player campaign will be more extensive than its predecessor.