Activision has released a teaser trailer for Call of Duty: Ghosts, which ends with a promise of live gameplay footage at the next generation Xbox reveal event on 21st May.
In case you're unable/unwilling to put two and two together, this is a strong hint that Activision has signed yet another exclusivity partnership with Microsoft. The game has now been confirmed for next generation "consoles", so we're probably talking DLC at most.
Here's a rundown of rumoured features. More shortly.