The first squad of Ange Postecoglou's reign as Socceroos manager will be unveiled in Sydney on Wednesday morning - but the promised revolution is on hold.

Australia will square off against Costa Rica on November 19 at Allianz Stadium in what will be Postecoglou's first opportunity to see what he has to work with ahead of next year's World Cup in Brazil.

But while tongues are wagging in anticipation about an injection of fresh talent, Postecoglou is likely to call in the squad's veterans, such as Tim Cahill, Mark Bresciano, Mark Schwarzer, Sasa Ognenovski, Archie Thompson and under-pressure captain Lucas Neill.

Postecoglou is going to use the days before the match to speak with the players and observe them in training to consider whether they can still justify their spots.

But it is almost certainly the last time the senior players will be considered automatic selections, as they were under Holger Osieck.

One Football Federation Australia insider foreshadowed that it would be ''the most intensive training camp seen for a very long time'' as the wily veterans competed to hold their places.

It is expected that Postecoglou will leave his experimenting with younger players for future friendlies, the next of which will take place in March.

There is also no guarantee that Postecoglou will start Neill - and there is every chance he will be forced to relinquish the Australian captain's armband.

While Cahill has been mentioned as a possible candidate to take over, a more likely option would seem to be Mark Bresciano.

Bresciano is the player Postecoglou will almost certainly build the team around, for his ability to control the tempo of matches and create opportunities with his passing remains unparalleled.

But Cahill's form this season has been exemplary, and his standards since leaving Everton for Major League Soccer's New York Red Bulls have shown no signs of slipping. He scored his 12th goal of the season this week and has built an electrifying partnership with Thierry Henry.

New York teammate David Carney - the original solution to the left-back crisis left by Scott Chipperfield's retirement - looks less likely to be called up as his club form remains patchy.

There could be some changes at selection on match day, with talk that Ryan McGowan - left exposed against Brazil as a fill-in right-back - could be given a chance to restore his confidence in central defence.