I put down the BE. 2 for a guess into their minds, because of the Taube, but I am hoping for "other", meaning a French or Austro-Hungarian plane. If they can go "post war" and release versions of the WWI planes that served in the 20's, then I'd love to see the Taube with "pre-war" cousins in Air Race land... all of the "Magnificent Men and Their Flying Machines" would be the most amazing surprise. Alternatively, a Breguet XIV with US, Polish and Middle Lithuanian colors would be high on my list, along with the forever rumored (by Special Hobby/cmk/etc.) Hansa Brnadenburg C.1 or any Austro-Hungarian fighter, recon or bomber. So many alternatives exist that we could be surprised for years.
In the end, it isn't about my choice, it is in the mind of Sir Peter and the execution of his team. Thanks for the fascinating options we have already been favored with, and "Please Sir, could I have some more?"