Update 9/10 - More information released here alongside the pre-load times.
The Modern Warfare Open Beta has been announced!
There is a lot of information available about that, but here is some information from our two main support articles. First and foremost:
Modern Warfare Beta FAQ
All of that information can be found here: https://support.activision.com/articles/en_US/FAQ/Call-of-Duty-Modern-Warfare-Beta-FAQ
Modern Warfare Beta Code Support
All of that information can be found here: https://support.activision.com/articles/en_US/FAQ/Call-of-Duty-Modern-Warfare-Beta-Code-Support