So on the official youtube channel for crysis they just released the lost island dlc as if it came out recently and maybe they are doing this so more people will buy the game and the dlc.
If people do buy the game and the dlc crytek may consider another patch

If you have not seen the trailer for the dlc map pack of crysis 3 here is the link -

http://www.youtube.com/watch?v=57nU2_kvGvM