NZ Rugby/Sanzaar are hoping to host the 4 team Rugby Championship in NZ later this year. Travel exemptions will be needed for Springboks, Wallabies and Pumas all to enter and play in NZ. Though visiting teams may need to quarantine in NZ for 2 weeks pre playing any games.
If that happens definitely a precedent for possible A League Socceroos v A League/Handy Prem AWs, fixture(s) maybe even in NZ - prior to 2020/2021 A League season. That's should the FFA and NZF have the motivation for such a game(s).
All depends on what happens over the next few weeks & months in Aotearoa. Mask up NZ.