First up is New Zealand-based Wellington Paranormal, which follows hapless cops Kyle Minogue and Officer O'Leary as they investigate weird goings-on in the Wellington area. Minogue and O'Leary appeared several times in the movie as the easily-hypnotised cops constantly getting involved in the vampires' misadventures. A first season of 13 episodes has already aired and a second season has been commissioned for 2019. So far an international distribution deal has not been signed, but I wouldn't be surprised to see this showing up on Netflix or Amazon before too long.
Clement and Waititi have confirmed (albeit possibly with tongue firmly in cheek) that they see the movies and TV shows as all taking place in one big universe (possibly Waititi's exposure to the Marvel and Star Wars universes coming through there) and there's a chance characters from the original movie may show up in both TV shows in some capacity.