At last weekend’s VGAs, Bungie producer Curtis Creamer commented on why there hasn’t been any downloadable content for Halo 3: ODST and why we shouldn’t expect any.
“[DLC] was something that we didn’t really think we could do for ODST because traditionally all of our DLC has been about competitive multiplayer,” said Creamer. “That’s something that we had the systems in place for. But, since Firefight is more based on the cooperative campaign mode, that was a technology that we hadn’t built up to a point where we could add DLC to the game. It would have been too much of an investment to make that happen.”
So there you have it, no DLC for ODST. What Creamer says makes sense, and it’s not particularly surprising to see no DLC for the game. Bungie’s currently focused on Halo: Reach, which is expected to release towards the end of next year. Reach will also be Bungie’s last Halo. After that, the IP gets shifted to Microsoft subsidiary 343 Industries.