This is never gonna happen for a couple million reasons, but isn't it pretty to think so? Tom Shales speculates as to Diane Sawyer's future:

Let's say, though, that Sawyer stays at "GMA" (though her agreement allows her to leave before summer). The show will never have a shot at No. 1 with those two at the helm, so what could be done to rejuvenate it? Sawyer needs a partner worthy of her-a male partner to give the show variety and sexual tension. How about this: Anderson Cooper. Languishing and almost vanishing within the stuffy confines of CNN, super Cooper needs and deserves a much better showcase. Imagine Cooper and Sawyer side-by-side at 7 a.m. They'd be the most gorgeous and telegenic couple in the history of the morning news.

And the sexual tension? Palpable. Oh cruel fate, why would you deny this pairing?

What Will the Morning Bring? [TVWeek.com]