From Press Release:
Get excited, because we are just a little over three weeks away from the launch of Call of Duty: Modern Warfare II, available on October 28.
Team up with TF141 a week early with Campaign Early Access, available with Modern Warfare II digital pre-orders. Pre-order here: https://www.callofduty.com/
For details on other pre-order bonuses, check out the Call of Duty blog: https://www.callofduty.com/