Very wrong.
Singapore-Australia-Europe flights are currently impossible to
certain points in Europe, even with the ultra-long range 772LR, let
alone with the A380. Besides, there are no flights between
Singapore and Europe via Australia. SQ is vying for a piece of the
lucrative Australia-US routes, which the A380 will be deployed on
if SQ got the rights.
SQ will be flying the A380 on the SIN-LHR-SIN and SIN-SYD-SIN,
among others which includes SIN-LAX (via TPE and/or NRT).