They have formed a project committee who is looking into all of it - they are saying about 6 months before they are going to make any real decisions on what to do... but I would say its a fair bet that it will be east coast oz (and not necessarily SYD for that matter - BNE would be a good place to start from, given the existing crew infrastructure thats already there, not to mention more flexibilty with departure slots etc) to SFO/LAX and probably HKG/PVG/NRT in time
Bring it on I say - although its anyones guess as to who will crew it - a contract company is highly likely