Yea, likely beta 8 tomorrow or by Thursday, and then GM the day of event on 9/14. Maybe we'll see a beta 9 next week but unlikely I think. Then 15.0.1 the day the new iPhones start arriving on 9/24.Beta 8 tomorrow.
Hopefully the iOS 15 features that were dropped in recent betas come back as soon as 15.1 in October or November.