Recently announced is the Naval Strike DLC coming out in Late March for Battlefield 4 Premium members. This most likely means a 3/25 release date as most DLC's are released on Tuesdays. Non Premium members should get access 2 weeks later which will most likely end up being April 8th.
This will include 4 new maps that are set in the South China Sea. There will be new weapons gadgets and vehicles including a hovercraft. There will also be 10 new assignments. Most importantly though is the addition of the Carrier Assault game mode which is a throwback to the Titan mode introduced in Battlefield 2142.
The Four new maps are:
Wave Breaker
Nansha Strike
Operation Mortar
Lost Islands
This DLC should be a great addition to the Battelfield 4 lineup.
Here are some screenshots and info from the upcoming DLC and map.
Four All-New Multiplayer Maps
Blow open a crashed passenger plane and capture fishing villages across the tropical Lost Islands. Drop a submarine on your foes as you infiltrate a naval base or rush between shipping docks and rocky islands on the massive Wave Breaker map. Wage war across stormy seas in the largest ocean stretch in a Battlefield map yet with Nansha Strike. Storm an abandoned cliff-side resort, or get lost in the breathtaking vistas in Operation Mortar.
For additional info, see the official Battlefield Blog.
http://blogs.battlefield.com/2014/02/first-glimpse-of-naval-strike/