http://www.bloodyelbow.com/2010/5/15/1473434/don-king-promotions-successful-in EDIT. Shine Fights have just made a statment and said that they are ignoring King and the fight still goes ahead.
I'm not surprised. Something almost always happens to screw up these events whenever boxers cross over into martial arts. I remember ordering a K1 Grand Prix finals PPV back in 2004 because Shannon Briggs, Francois Botha, and Ray Mercer were supposed to be fighting on the card - but when the event finally went through - only Botha wound up fighting.
And suddenly Mayorga has a fight with Felix Sturm for the WBA middleweight belt. WTF? Maybe this was all a ploy by Mayorga to trick Don King into getting him a fight!