DICE has just tweeted that it will be showing the Battlefield Bad Company 2 expansion Vietnam at the Tokyo Game Show, this is the first proper reveal for the content.

"This is it! I am going to Tokyo Game Show to showcase Battlefield: Bad Company 2 Vietnam for the first time -- and to spend some quality time with the Japanese Battlefield Community. As you may already know, Vietnam is an expansion pack to Battlefield: Bad Company 2 with 4 brand new maps built in Frostbite, as well as Vietnam specific weapons, vehicles, persistence, unlocks, and achievements/trophies."

Source: Battlefield Blog