https://wccftech.com/microsoft-begins-working-on-windows-10-20h1-due-for-2020/

Microsoft has delivered a new Windows 10 Preview Build to Windows Insiders who managed to get into the Skip Ahead program. While we were expecting the Windows maker to drop builds from the 19H2 branch (version 1909) due for a release at the end of this year, Microsoft has managed to surprise everyone by starting working on Windows 10 20H1 – the version that will be released in April next year.

“Some things we are working on in 20H1 require a longer lead time,” Dona Sarkar and Brandon LeBlanc wrote in today’s blog post. They promised to begin releasing 19H2 builds later this spring after 19H1 is ready for public release. The blog post added that “once 19H1 is ‘nearly finished and ready’ we’ll also use the Release Preview ring for previews of drivers and quality updates on 19H1.”