I wouldn't be writing Jetstar off. They, like their parent company, are a ruthless bunch and they are good at what they do. Don't forget that Jetstar was set up to counter Virgin and you could easily say mission accomplished. Tiger was the next one to go and they were never in the game. As for Rex they might know regional operations but HCAOC is the next level and if they think that it is just a matter of upscaling a turboprop operation then they will be the big loser. For better or for worse Jetstar has brand recognition and anyone wanting to fly will want to know that the seat they have purchased will be around for the long term.