Are you suggesting that QF will change their minds about which routes will be the sunrise routes?
They've stated that they will operate 4 sunrise routes, SYD-LHR, SYD-JFK, MEL-LHR and MEL-JFK. They haven't yet said what order they will start in, but it is clear that they will either start both SYD routes first, or both LHR routes first.
If they were to change a route from one already stated, it's likely to be the MEL-JFK that gets removed. They'll only have enough A350-1000ULRs to operate 4 sunrise routes once fully delivered.