https://techcrunch.com/2017/11/08/niantics-follow-up-to-pokemon-go-will-be-a-harry-potter-ar-game-launching-in-2018/

Niantic Labs had tremendous success with Pokémon Go, which paired their expertise in building location-based augmented reality mobile experiences with a top-flight IP with a ravenous fan base. So, it stands to reason that we should expect a similar fan response to Harry Potter: Wizards Unite, an AR title set to launch in 2018, co-developed by Warner Bros. Interactive and its new sub brand Portkey Games.

Niantic building a Harry Potter game similar to Pokémon Go was rumoured last year, when the company noted that it had acquired the rights to the app. But the rumour was subsequently debunked, oddly enough, with the original article containing the information pulled from the web.