The developers of Mortal Kombat are doing something very interesting on the DLC front. instead of simply releasing paid for add-ons they are releasing DLC which will integrate with DLC.
Simply put, gamers will have the opportunity to download 2 free skins for Smoke and Noob. These skins will be used in more DLC which will release the same day.
Called the Compatibility Pack #2 it comes after the first pack which used the same system of offering free skins for paid DLC.
View the trailer for the pack here