"straight from the video editing suite", which tells us to 'Prepare 4 Battle' along with the date of '03.27' and some up-close shots of tank treads.
EA and DICE are imminently due to announce the next entry in the Battlefield series now that DLC production is all wrapped up on Battlefield 3 after End Game.
"Straight from the video editing suite: Prepare 4 Battle - 03.27! This sneak peek now, more soon," EA. Battlefield 4 will release before April 2014, which lines up this October pretty nicely.