A couple of things...
1) The Khan fight taking place in Dubai and the Valero fight taking place in Mexico?! I don't think that will happen. Pacquiao is too big to fight somewhere other than Vegas. MAYBE if he fought Valero somewhere other than Vegas could happen cause of him having trouble getting cleared for fights in the US.
2) If he is actually going to fight Diaz then Khan then Valero, it's probably because of the criticism Pacquiao gets for only fighting people "past their primes" (Barrera, Morales, Marquez). But to be honest with you, if he does get past these guys, then people will just say "these guys weren't ready for Pacquiao" or "they were too young and not tested yet."
3) If he does go for the path were he encounters Campbell and Casamayor and beats them, then continues the whole "Campbell and Casamayor have seen better days" comments.
Bookmarks