Shamjet, the QF A330-200s are not idle, but are used (pretty intensively) on Australian domestic routes and are very popular. Ultimately, the plan is to put them on long haul routes. Doesn't look as if they are a likely source.
It's not impossible that a deal for Boeings (widely expected) could see an end to A330s, but even if a deal is announced, it could be some time before the 777s arrive (and apparently they are starting with 773s anyway, to replace the 743s), so I wouldn't hold my breath on the QF option.
This underlines one of the key problems for EI, particularly on t/a routes. They don't know when they'll get the rights, which makes it extremely difficult to plan new fleet intake, because they don't know when they'll need them even if they could get them. All thanks to our govt. Thanks guys.