What do we know about the potential future film,The Wasteland?

I just watched Furiosa and Fury Road back to back, and it feels like an epic of par with Lord of the Rings

I just found out Miller was going to make a Mad Max film called The Wasteland, but it might not happen now.

Anyway, what do we know about it it anything?

I read it was meant to be a sequel to Fury Road, but didn't know if that meant an actual sequel or a film that just takes place after it in the timeline.

So, what do we actually know about the film?