Its totally possible. What Id like to do, is reactive an EXISTING BG to replace one of the Japanese BG's that comes in. So on the turn you get the Japanese airborne, you'll get the US 82nd Airborne (who exist ingame already, but for some reason arent included in the campaign :\ ) as one of the buyable call-ins. With the existing Japanese BG merged with one of its peers and repriced.
The 82nd is mostly lighter stuff, but also has the M8 AGS included, as well as Avengers. Its a solid BG.
So you get that array of Japanese Airborne, and then the US 82nd Airborne as a buyable as well with appropriate text