Radical. Conflict Denied Ops alters its difficulty dynamically as you work through its campaign, according to Pivotal's Terry Watts, and for those determined to be harder than hard, there's a hidden super-tough level only unlocked after you beat the hardest setting.
"We've got three difficulty levels, and a fourth that's unlockable once you've completed the game," said Watts. "But we've also got an auto-adjust difficulty level on the campaign structure, so as you work through the campaign, the game will get more difficult within its span, so Easy will become harder as it goes along, but will still remain within that Easy within that band. But yes there's also a dynamic system that adjusts as you're working through the campaign, so hopefully there's enough control for the player and also the right difficulty balance as well."
The latest in the successful shooter series allows solo control of two characters, which is being seen as a plus over games like EA's Army of Two. Eidos is publishing this, and while there's no fixed date we must be pretty close. The demo's on Xbox Live already.