I'd be interested sure, but are you planning on making like regular soldiers vs. soldiers war? Or more of a special forces infiltration game.
I would recommend making it more tactics and strategy orientated. Without High-tech, or magic, you would have less commandos and one men armies. Teamwork and squad tactics should be the order of the day, to make a balanced game. (But you all knew that already)
Actually. . . A commando based WWII squad is a good idea.
Stealth missions, to sabotage, to recon, to assassination, to defending a town guerrila style, to stealing maps, or code machines, to stealing enemy war machines, to blowing something up. This could work out very well.
Sounds better than vanilla soldier. March, build base, fire shells, defend ambush, move out, build new base, etc.
So yeah, I'm interested, but still wondering what angle you were going to take it?