After completing the Threshold branch of Windows 10, Microsoft is progressing with Redstone 2. Under the Redstone initiative, the company plans to introduce three feature upgrades, with the first, codenamed Redstone 1, released this August. The current focus is on Redstone 2, which is now in development, and some builds have already been released to Windows Insiders. This version i.e. Redstone 2 would probably be version 1703.
All Windows 10 builds released in production have a version number. The first build, known as TH1, is unofficially labeled 1507. The second build, TH2, is officially named version 1511, while the last stable build, known as the Anniversary Update, is labeled 1607. The version numbers typically reflect the year and month of release (for example, 16 indicates 2016, and 07 denotes July).
Recently, a prominent Microsoft watcher, known as WalkingCat, has reported that Microsoft plans to label the Redstone 2 production build as version 1703. This suggests that Redstone 2 will be released to the public in March 2017. Here is a tweet from WalkingCat:
RS2 = Windows 10 Version 1703— WalkingCat (@h0x0d) October 14, 2016
It was confirmed earlier by the software giant that Redstone 2 would be released around earlier 2017.
Though plans can always change, but I hope that it is around the specified month.
Thanks to winbeta as well.