EXCLUSIVE

It's as shocking as Saturday night's fight was awesome ... there will be no Conor McGregor and Nate Diaz trilogy ... according to the man who makes the decision.

Dana White tells TMZ Sports he wants Conor to defend his title against interim champ Jose Aldo. Dana says, "The war was fun and super successful but I'm movin' on." Here's the rub -- Conor beefed up for his fight against the much larger Diaz. Conor normally fights at 145 and swelled to 168 to fight Diaz.

Dana says Conor has two options -- either fight Aldo or surrender his title to him -- or cut weight to 155 and fight Eddie Alvarez for the lightweight title.