Microsoft is expected to release a beta or alpha version of its next operating system, Windows 12, in March 2023 with the final version expected to be released sometime in 2024.
Windows 12 news
Microsoft opens a new testing channel - probably for Windows 12
Also, heads up, Windows 11 testers: you may need to reinstall your OS if you don't want to be shifted over to testing the next incarnation of Windows.
Intel's 14th-gen Meteor Lake-S desktop to support the unannounced Windows 12
Windows 12 is rumored to be coming in late 2024, and a new Intel next-gen Meteor Lake CPU leak is stating that hardware support is already there.