If you look at the bottom of the poster, where direct credits are given, you can see the music will be by Avenged Sevenfold and 45 Grave.

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One can assume both of these bands will contribute to the usual "Secret Song" that appears in all Black Ops zombie maps, which makes sense due to the significant (by Treyarch's standards) size increase of the Call of the Dead map.
It may be, however, that one of these band's songs is actually the "Game Over" song played when all players die. There are reasons for and against either songs to serve such a purpose, and thus be the expected song for the next CoD zombie map.

Potentially, the song to be included by Avenged Sevenfold will be "I'm Not Ready to Die", which can also be supported by the fact that the single is set to debut on May 3.


45 Grave's song addition is arguably less speculated. However, there is sufficient reason to believe that it's song addition will be "Party Time". First, "Party Time" is the band's most popular single. Not only that, but the song is also featured in the film adaptation of John Russo's The Return of the Living Dead. This isn't extremely important at first glance, but after some research, you can see that it is John Russo who actually took the rights away from George Romero to produce anymore movies that included "The Living Dead". What better way to annoy Romero than to play a song featured in a movie inspired by Russo himself?


Again, just speculation, but may actually be true. Won't know 'till May 3.