due to the nature of Infinity Ward not commenting on leaks or unrealeased content found through the use of hacks, NOTHING IS CONFIRMED! do not listen, people say new camo, new game modes, new guns, new killstreaks.. Well they are all just RUMORS, or things found on the game itself. This could mean it will be released sometime in the future, but it also might not be. As for a release date, NO DATE IS CONFIRMED at the time of this post. Sometime in the spring, we don't have an official date so please stop asking and spreading rumors. Listen to these words of wisdom
"No proof, no thanks"

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UPDATE - Saturday march 27 2010

The map pack has been confirmed for a while now, and we all are happy! but remember there are still rumors, just a few of which I would like to go over

1.) OHEMGEE ALL ARE GONNA BE BANNED ON 30th!!!111
False, nothing has been confirmed or told about a check for modded lobbies, GT's, or any other types of mods other than the usual checks. If you haven't been caught yet, your just as safe as you were.
2.) GTNW ARENA CTF1F VIP ARE COMING WH0000000!!111
False, as of now only 2 new game modes have been confirmed via twitter
3.) Spinning 10th skull will be unlocked on 30th.
False, as of now we have no idea how if even it is possible to unlock that emblem, and no information has been released on it as infinity ward doesn't comment on leaks.
4.)10th mods won't work on the 30th, were out of buisness! *Cryface*
False, lets face it if Infinity ward knew what they were facing they would have said they were working on a way to stop it. They are ignoring the issue because they don't know what/if anything they can do to stop it.
5.) More DLC will be coming
True, depending on how the sales of the current DLC go they will be considering making more.
6.)New gun camo will be coming, my friend uncle who is a janator at infinity ward heard fourzerotwo say so
False... and Wtf... No new gun camo has been confirmed.
7.) New title's are coming soon
True ish, this is the one fact that isn't quite a fact. While fourzerotwo has asked the community what it would think about more titles/emblems nothing else has been said. so for now, we dunno

If you have any rumors, post them and ill add em.