An endwar FPS.
The same principle, however at the begining you get to design what your dude looks like in a sort of "sims" style where you get to pick hair colour and everything.
Then you pick your faction, and the division you will join.
Armoured division for example will make you more likely to get tanks and less likely to get gunships. Your division will also give you special attributes, like with an armoured division you may also get an extra health bar, but as a result you are slower (like a tank see).
Then, as you go through the game and win missions you should be able to upgrade yourself, your armour, your weapons and the vehicles and abilities available to your division, using points. this could be done in a sort of Fallout 3 style. The less times you die and the more enemys you kill the more points you get and then you pick from a list what you want to upgrade. Obviously they wont be the same as fallout 3 because cannabilism will be pointless in a war 9at least conventionally)
The actual gameplay could be done in a Frontlines: fuel of war style, where theres a frontline across the middle of the battlefield with objectives on. once one side has captured or destroyed (depending which objective) all those objectives, the frontline will move up in favour of the winning side, untill the frontline has pinned the enemy all the way back and thats when the objective changes to annialate.
I would gladly pay £60 for a game like this.