Confirmed release on July 15th (Premium), and 2 weeks later if you buy it separately.
This DLC will include 4 new maps (Lumphini Garden, Pearl Market, Propaganda, Sunken Dragon), a new game mode (Chain Link, a twist on Conquest mode to link capture points in order to win), the Ballistic shield gadget, and the R.A.W.R battle pickup.
Platoons were just implemented in Battlelog for Battlefield 4, I created the platoon and added everyone in my friends list to the platoon, also made a custom emblem for the platoon, once you join the platoon it will add your tags and will make your emblem the clan emblem (see above). This is by default, you can however go to your profile and edit your emblem to show your personalized emblem like before. Using the clan emblem isn't mandatory but I think having a "branding" for our clan isn't a bad idea. If you didn't get the invite you can apply to join here: Battlelog Link
Today EA confirmed that the second DLC for Battlefield 4 will be released for Premium members on February 18th and for everyone else two weeks later on March 4th. Second Assault will include some new weapons, assignments, return of Capture the Flag, plus 4 old maps: Operation Metro, Caspian Border, Gulf of Oman, and Operation Firestorm, which have been revamped with Frostbite 3 engine and have levolution like the original BF4 maps.
News about the third DLC named "Naval Strike" has also been announced and the DLC should be released for Premium users in late March. It will have new weapons, gadgets, amphibious vehicles, and four new maps: Lost Island, Nansha Strike, Wave Breaker, and Operation Mortar.