Amazon US has already updated their pre-sales pages with date SEP 12 and time 5:00am.

Other sites such as iTunes and YouTube US & U.K. are still with no date info, but will surely update anytime soon, as WB just made it official.
2/2 pic.twitter.com/ZskNDE9uJk

— Luiz Fernando (@Luiz_Fernando_J) September 5, 2023