Bungie’s cleared up “an oft-asked, but pertinent question” regarding multiplayer content on Halo 3: ODST. Specifically, yes, it will have all 24 Halo 3 maps.
Quoth Bungie:
Just some minor housekeeping this week. We wanted to address an oft-asked, but pertinent question about the Halo 3 Multiplayer content that will ship with Halo 3: ODST this Fall. All twenty-four Halo 3 Multiplayer maps [[link]] will be in the box. All shipping maps: The Heroic Map Pack, The Legendary [[link]] Map Pack, Cold Storage, The Mythic Map Pack, and three brand new exclusive maps are included.
So, if you don’t want to buy the DLC maps [[link]] or if you, like me, sold Halo 3 in a recession-induced fit of panic, you can climb back aboard when ODST drops in the fall.
Halo 3: ODST [Inside Bungie: News via vg247]