A new message on Black Ops 2 on Xbox 360 has confirmed that Nuketown 2025 MP map will be a mandatory download starting March 26th. Nuketown 2025 is available for free to download now on Xbox LIVE.
Treyarch is doing this so that they will be able to put Nuketown 2025 is all the playlists.
This map will be available on PS3/PC for free at a later date.
SOURCE: Black Ops 2