Will the Libs take the easy option and make Costello the new leader or will they realise he's not popular with the electorate and perhaps look at Turnbull who's probably more marketable?
I'm a bit of a Costello fan but I must admit I can't see the Libs getting up at the next election with him in charge, he'll probably have to endure 2 terms as opposition leader before having a realisitic chance of being PM.
Some would argue with Turnbull its unrealistic to see him as PM but lets face it everyone thought when Mr Rudd took over that it was unrealistic he'd ever be a PM.