I dont know that I see much
I dont know that I see much of a difference between the Today Show and Good Morning America.
In terms of the debut, I believe that the media (both automotive and non-specific) will cover the 2015 Mustang debut so closely with locations in six major cities around the world that the company really wont need to do much on their own - such as an online debut. I would expect that if Ford doesnt have some sort of streaming video of the debut, they will have videos available shortly after the car is unveiled.
Thanks for reading!