Kursk: Two players… actually you would have 3 players AGC/ AGS and the Soviets. So that way the Germans can conduct independant operations which were pretty much like it was.
El Alamein: Two Players ( actually The Italians could possibly be a third player)
Stalingrad: 2-3 (Romanian units also) This is a good choice but probably should cover the entire 1942 campaign.
Guadalcanal also would be a great one. Larry Harris is coming out with this it was declared last year for a late summer release.
What i really want to see is a Barbarossa Campaign covering 41-45, then a western campaign for France 1940 or 1944-45. The maps would be linkable with a third “african campaign” This would be the best vision for the line.