Schlong,
Not a bad thought, but the reason Qantas Link operate under that banner is for branding purposes, not anything to do with the AOC.
Impulse have set the precedent in this regard; they operated under the Qantas Link banner for some time, whilst still operating under the Impulse AOC.
I don't think there'd be anything to stop JQ crewed aircraft being operated as Qantas flights in QF colors. That doesn't mean that I think it is a certainty, but I've always thought it was a very tempting card to have up the Executives' collective sleeve.