If he does come, it will end a near eight-year search for the Blues, who have been looking for a quality No 10 since Carlos Spencer left in 2005.
Since then, the Blues have tried to sign Carter, Cruden, Jonny Wilkinson, Juan Martin Hernandez, Mike Delany and Barrett.
Carter came close to saying yes in 2009, but ultimately the Blues have only known rejection in their efforts to sign a genuine star player. Chris Noakes, who has been their starting No 10 this year, is a solid if limited player and was viewed as a holding player-a safe pair of hands in the absence of better options.
Baden Kerr has potential to develop but it is probable that Marty McKenzie, the former New Zealand under-20 player, will have to be de-listed to make-way for Barrett or someone else.
The Blues are also hoping to progress talks with NRL star Benji Marshall - who Kirwan says he views as a potential first-five. Presumably, should Barrett sign with the Blues, they would continue to try to lure Marshall as his skill-set could be utilised almost anywhere in the backline.