Er Zeal320 was the operating company that operated the A320s for both Air NZ and Freedom. Designed so that Air NZ crews would work for Freedom money - basically to save costs. With the Freedom brand having been dissolved, there was really no need for a separate company so Zeal320 is no longer (or will be soon).
Freedom was closed because there was no real need for a duplicate company. Freedom had also served its purpose - remember Freedom was a Mount Cook thingo designed to kill Kiwi.
By the way, everyone knows that Jetstar replacing Jetconnect was no coincidence - it was meant to be. Qantas was not doing well over in NZ really. There's not a lot of difference.