Personally I don't have many wishes for specific aircraft. I'm very sure they'll pick the important ones.

What I'd love to see though is aircraft that are slightly different. For example I do believe that during that campaign there were aircraft with ski instead of regular gear.

another IL-2 with ski (bigger)

Depending on map size even the finnish Fokker D21 on ski could be modeled?

Planes like these would be of high interest to me because of the way they work and are flown and landed.

Also I'd like to see more water planes and let's not forget the Su26 But that just on a side note.