The basics: some sort of rift has appeared in between the wizarding and muggle worlds. The player plays a witch or wizard trying to put things back together by collecting "foundables", which could a number of things, be they artifacts, creatures, people or memories from the wizarding world.
There will also be a team system where players will be able to play either as Aurors, Magizoologists, and Professors, each with their own skills and abilities.
More info on the game in the article.
The game will come out sometime in Summer 2019.
Sources: The Hollywood Reporter tweet Forbes