'A serious World War II grand strategy game on the DS' is right up there with 'Peace in the Middle-East', 'Duke Nukem Forever' and 'A badger at the helm of a Premier League football club' in my Things I Didn't Expect To See In My Lifetime list. The PC is awash with them (serious WW2 grand strategy games, not badger managers) but none have made the scary leap to handheld. None until now.
Trail-blazing Commander: Europe at War is grand strategy not because its panzers have walnut dashboards or its generals swan around in mink pants (though with Goering, who can tell), but because its units represent entire army divisions, fleets, and airforce groups, and its one seamless map encompasses a whole continent. It's serious because it digs deep into the history, and works hard to deliver plausible scenarios and outcomes.