Just today we reported that Microsoft is internally testing a new Threshold build for the Stable branch 10586.492 compiled on 28th June 16..
Now a new build has leaked online with OS version 10586.493 and this build is compiled on 29th June 2016 for Windows 10 PC and Windows 10 Mobile Threshold.
We do not know as to what new features or bug fixes will this build going to bring to the stable branch if the latest build is actually released to the public.
This will be another Cumulative update for the stable branch which may include more bug fixes and performance improvements rather than any new features.
Currently there is no confirmation as to which build will make it to the public version as there have been three new builds compiled by Microsoft in a matter of 2 days.