Ortiz beats Khan, I'm certain. Margarito would be really intresting, but I can't see that scumbags eye holding out. (Good, make the fight happen.) Canelo would be a brilliant fight to see, and I'd lean towards the bigger guy. (Oscar isn't making that fight, no way does he put his mini me in with his golden ticket)
The thing is, dude, being on a PPV event means nothing if they [Khan, Canelo and everyone] would be taking a huge paycut. Not only would they be forced to share the stage with each other, but theyd be sharing with Mayweather and Cotto as well. In fact, the stage wont even belong to them! Its all about Mayweather and Cotto, and most of the revenues will be going in their pockets. Khan, Canelo, Ortiz and Kirkland wont get what they ought to be getting to face each other. And thats without mentioning the promoters, GBP, whod be losing out on tens of millions if they didnt give Khan-Ortiz and Alvarez-Kirkland the separate headline events that they deserve. Mayweather-Cotto sells on its own, and so it would be a complete waste to chuck two other major fights in with it.
Ortiz v Khan, a good fight would be headliner on it's own, both have largish profiles, and are 'glamour' names. It would make a lot of money for both of them. I think Khan fancies fighting Ortiz and if Ortiz does too, it should be good.