I bet you said that about the Floyd fight too. What happened in the Pac Floyd fight? Oh that's right, Pac fought like an amateur and got his ass handed to him That's cause all the big names are too afraid to fight him.
Khan is a Haymon fighter and Pacman is a TR fighter. Khan doesn't have a name that's big enough to warrant a match between these 2 promotional companies who have been at odds for years. They made the May-pac match because of the magnitude of that event. Both TV networks also played nicely so that the fight could materialize. Khan just isn't at the level of a Mayweather or Pacman. And to make matters even tougher, with an ongoing lawsuit between Arum and Haymon, I don't expect either company to do business with each other in the foreseeable future.