Gabriel Aul has today sort of confirmed that Windows 10 Mobile Build 10536 is the next build coming to Windows Insiders. In reply to a tweet, he has mentioned it (Build 10536) to be in the internal slow ring and has also mentioned it as the next release candidate.
@shuja75 10536 is in our internal slow ring currently, it’s the next Mobile candidate.
— Gabriel Aul (@GabeAul) September 9, 2015
Gabe has reiterated his promise of a new build out this week. So seems we may see Build 10536 on our devices mostly tomorrow, as Fridays are so-not-likely!!