Update: It turns out the reason Prime was probably part of the commercial is the recent business deal between Discovery Communications and Hasbro to launch a channel sometime next year. "The rebranded network is
scheduled to premiere in late 2010. The network will feature content from Hasbro’s rich portfolio of entertainment and educational properties, and content from Discovery’s extensive library of award-winning children’s educational programming, as well as programming from third-party producers." Thanks to Katie for the link.