3 Months Ago, Chris Pereira from 1up.com says (in Opinion: TGS 08: First Details on Halo 3: Recon Emerge) Multiplayer will support four-player online co-op (is this perhaps the squad element we've heard about in the past?), new maps, and "full" Forge options. It's unclear if that means Recon will support all of the Forge functionality from Halo 3 or if Bungie will be implementing new feature...

And Canarack from Halo 3, Halo 2 and Halo Forum and Community says (in Halo 3 Expansion Details Released!) Developer: Bungie
Format: DVD for the Xbox 360 video game system; Xbox LIVE-enabled
source: IGN: TGS 2008: Halo 3: Recon Facts Title: "Halo 3: Recon" Publisher: Microsoft Game Studios Developer: Bungie Format: DVD for the Xbox 360 video game system; Xbox LIVE-enabled ESRB...

And Dan Landis from Ripten Video Game says (in Halo 3 Prequel Announced and Detailed) Official game description from Xbox.com: All-new campaign content: The Halo 3: Recon campaign is an intriguing side story that takes place during the terrifying events leading up to the Master Chief’s return to New Mombasa in Halo 3. Experience the fate of Earth from the brand-new perspe...