Word on the street is that QR's newly opened ADL is not doing so well, so apparently the ADL service will operate DOH-ADL-MEL-DOH on certain days of the week and DOH-MEL-ADL-DOH on the other days.

Note that this will be a new flight for MEL; QR904/905 remains unaffected, thus QR will operate 2 services into MEL. There is no word on timing yet.

This is just an apparent rumour but there is some weight to it, lets just wait and see!