Battlefield 4 Naval Strike features a brand new game mode, Carrier Assault. This is similar to titan mode in Battlefield 2142, for more info on carrier assault, watch the videos below the slideshow. They aren't mine, they are LevelCap's, please subscribe to him. He makes great Battlefield series videos.
The weapons, however, aren't delayed. They are, the Ar160 assault riffle, the Sr-2 PDW, the Aws LMG, the SW40 pistol, and the SR338 Sniper riffle. I will have a video for all of the weapons that I have unlocked so far.
I am really excited for this new DLC, and can't wait for the new game mode.