Gamespot points out an entry on the Korean XBox site (since removed) that listed an expansion pack for Halo 2 as 'coming soon'.Gamespot speculate on Microsoft's plans:
The one-line listing had no other description or firm date. That said, its presence on an official Microsoft site added credence to the theory that Microsoft cut Halo 2 short so it could roll out a large expansion akin to the Ninja Gaiden Hurricane Pack at a later date via Xbox Live--for a price. Such a Halo 2 expansion could be a twofold boon for Microsoft, adding another incentive for gamers to join its online service and squeezing further dollars from the nearly 7 million gamers who already have Halo 2.
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