I think this is the second greatest Diva match in back to back Pay Per Views, since the era of Trish & Lita.
While Melina wouldn't dare try and match strength with Beth, the fact is Beth isn't exactly Chyna freakish with her power, and Beth can be stopped. Shes been beaten by Mickie James, and convincingly. With that said, Melina can become smart enough to out-do Beth and pick up a victory. Do I see it happening? No. But it could. And thats what needs to be focused on.
Making this match an I Quit match focuses on the fact that Melina can use weapons, such as cable cords, wires, and illegal objects to choke Beth out with, and attempt making her quit that way. It doesn't have to be a solid wrestling match, to be down right one sided in Melina's favor. That little hell-cat can dish out punishment, and she shouldn't be underestimated.
Although I think all this is doing, is building to the aformentioned/assumed Ladder match at One Night Stand, in which Mickie James will likely take on Beth Phoenix, or possibly both of these two. I think the shocker would be Melina winning, however if anyone has a secret advantage, I'd say Beth would have Jillian helping her, which would result in Beth/Jillian v. Melina/Mickie tag matches. (how great would that be!)
All in all, I see Beth picking up the victory, but not without a fight that a lot of people probably aren't seeing coming, or giving Melina an ounce of credit in.