Playing Chicken
I believe that UPS is in a stare down with Airbus.
UPS blinks first and cancels the 380 then they probably have to pay a large penalty.
Airbus blinks first and cancels the project then they have to cough up the bucks.
Look for some sort of face saving move by Airbus such as making a sweet deal on more 300s in order for them to cancel the freighter. Saves them more development dollars and brings in cash flow.