"While there is clear potential to generate international exposure if the fight is held in Auckland, we are unable to make a robust assessment of the potential of this event until the fight is confirmed to take place here and domestic and international television rights are secured."
When asked if he thought it was still feasible the fight could be hosted by Auckland, Longergan said:
"It makes it really difficult. David and myself have some big decisions to make over the weekend.
"Is it a mortal blow? Probably not, but it's a bloody significant one."
Parker and Ruiz were planned to be in Las Vegas to promote their fight during the fight night between Manny Pacquiao and Jessie Vargas for the WBO welterweight title.
However, those plans will seemingly have to wait until the hosting location for the title fight is locked in.