I would want to see a new Real time strategy of all of ww2 in every aspect, and minute details etc the total war franchise. Comes to mind Love their games. Not 100%sure if the have done it yet or not.
Closet one I've played is hearts of iron which is a fantastic game imo. Have to fight a war while dealing with resources and conflict in your country and alot more. Game has high learning curve at the start but once you get the hang of it, you'll realize it's been 10hrs and you have work in 30min. True Story heh