This release is expected to be the final release-candidate version, prior to the first full relase for 8.x. There will be a two-month window, from 7th August until 7th October, and if no new major bugs have been reported then 8.x-1.0 will be released.
The following issues have contributed to 8.x-1.0-rc2 the second 'release candidate' version for Scheduler 8.x, released on 7th August 2017.