After defending against Gonzaga he refused to fight anyone but Fedor and threatened to leave the UFC if they couldn't make it happen.
In the meantime, they set up Sylvia vs Nogueira for the interim title. Nogueira won.
When Couture agreed to return, still as the Champion, Nogueira as already booked to defend his interim title against Mir.
So Couture waited and defended against the winner of that fight, right? Nope! They immediately booked him to defend against Brock Lesnar instead.
In the meantime, they set up Sylvia vs Nogueira for the interim title. Nogueira won.
When Couture agreed to return, still as the Champion, Nogueira as already booked to defend his interim title against Mir.
So Couture waited and defended against the winner of that fight, right? Nope! They immediately booked him to defend against Brock Lesnar instead.