There has been concern from the WRC manufacturer teams and championship promoter about the lack of spectator support at Coffs Harbour and the costly logistics of running the event in the small coastal city.
To continue in Australia the WRC will need to find another New South Wales venue that meets the requirements of the teams and fits with the promotional objectives of Destination NSW which provides much of the funding for the rally - or move to another state where new funding can be secured.
Negotiations to find a new venue in Australia could be lengthy, creating an opportunity for New Zealand to host a WRC event for the first time since 2012.
New Zealand's most recent bid for a championship return came in 2017 when plans were being put in place for a 2018 event. That effort was focused on Tauranga as the host city with a two-day version of Rally New Zealand run as the final round of the New Zealand Championship in preparation for the WRC event.
''We put a lot of work into that and had a great relationship with Tauranga. I think we had a strong case but in the end we got turned down [by the WRC promoter] for 2018,'' said Johnston.
Auckland is set to host the event if it goes ahead in 2020.
''ATEED [the Auckland Tourism, Events and Economic Development agency] want the event in Auckland and have come up with a good support package and we're in discussions with government. We also need a naming rights sponsor.''
Johnston says running the event and finding roads is the easiest part but the timeframe is tight.
''I think we have about six weeks to make something happen. It has to stack up commercially, we won't do it without it being funded properly.''
It's expected a New Zealand WRC event would be a one-off for 2020.
''We're not really in a position to run Rally New Zealand every year and the reality is 2021 is out of the question because of the Americas Cup,'' Johnston said.
The World Rally Championship is an expansion phase with the 2019 calendar increasing to 14 events when it visits Chile for the first time next month while Japan is expected to rejoin the series in 2020.