Hypothetical #1
Airbus &/or Boeing reduce the price of their not yet built jets, QF buys them and the pilots acquiesce to the new T&C’s.
Hypothetical #2
Airbus &/or Boeing reduce the price of their not yet built jets, the pilots reject the new T&C’s and QF walks away from the project.
Hypothetical #3
The pilots acquiesce to the new T&C’s, neither Airbus nor Boeing reduce the price of their not yet built jets (or so we’re told) and QF walks away from the project. But the new T&C’s prevail on existing QF equipment.