I'm sure Qantas has a plethora of data detailing the number of pax who wish to travel this particular route, I'm sure if there was money to be made, QF or VA or AirNZ would've jumped on board.
Seems like more of a move of desperation by SQ who are so busy creating subsidiaries that are cannibalizing and competing with the mothership (sound familiar) that they don't know where else to put their aircraft.
I know we all give QF a hard time for the whole QF/JQ thing, how about SQ/Scoot/SilkAir/Tigerair ?