"At the time of those statements, the overall scope of Halo 3: ODST was not yet finalized, and since then the project has grown increasingly more ambitious. We believe this standalone experience is much more than just an expansion. Halo 3: ODST provides a new campaign from the point of view of an entirely new character. Combine that with three new multiplayer maps, the entirely new cooperative mode called Firefight, and the complete Halo 3 multiplayer collection on a standalone disc, we feel this is a good value and tremendous addition to the Halo franchise."
/\_ marketing bullshit for "we still want to charge you the same for something less. We will hype up parts of the game that actually add no significance, and are usually included in games with much much more content for the same price.
OMG a new character!? 3 NEW MAPS?!!! A new mode is cool..., and THE SAME MULTIPLAYER AS HALO 3!!!?!