Looks like it based on the article. Though I doubt the Avatar/Korra franchise itself was a huge inspiration for the park owners as much as "elements" are an easy way to differentiate themed areas while continuing the Polynesian motif. Kind of wish they had found some "element" for the kids area, but it looks like 'Tamariki' is a Maori word that roughly translates to youth/juvenile so it at least makes sense.
So glad to see a new independent park go up in an unexpected area, especially by owners who seem to want to do more than just put up a bunch of rides in a field and start selling tic