Of course there is the Airbus Option.......Rumour has it that the A340-500 is being considered as an addition to further Airbus A330-300 orders....these are from existing options ...so the Rumour has some credibility........This would make Perth London services possible...even desireable given the ability to avoid troubled areas over more traditional Routes.
Not to mention the possibility of East coast OZ ...East Coast US flights...........no wonder Singair is so desperate to achieve rights from the OZ Govt to fly OZ-US services now! they already have A340-500s ...Interesting Times Indeed !!