i have always hoped for the eventual release of the tournament maps for public play.
Anzio was fun as hell (from FHT), the WaW map pack was popular for some time also but my spidey senses lead me to believe that we will never see them implemented.
also, If you read the change logs there's tons of things that have never made it in game, which makes me wonder why someone's hard work was put into a product that we will never get to enjoy?
examples: Swordfish, Submarines, TORPEDOES!!! ...
ooh AdamPA just made a good point, will we ever see the bloody bastards of Bastogne?