Activision revealed that they are selling “Micro Items” in Call of Duty: Black Ops II as a way to customize the experience. This includes personalization packs for weapons, an option for more loadouts, uploaded movies and screenshots, and national flag-themed Calling Cards.

Also announced is that those who did not get Nuketown Zombies as part of the Hardened or Care Package limited editions of the game can get it as a standalone level for 400 MS Points. Finally, the pre-order bonus map Nuketown 2025 will be made available for free.
Source: OneofSwords.com