Too Long; Didn't Read
The official announcement can be expected at the Google I/O Conference in May 2020. The upgrade to Android 11 to take place in the year 2021. Android 11 will integrate new features as compared to Android 10, but as always you will have to wait for the latest version release to experience the new features integrated into Android 11. Google Smartphones, Pixel smartphones and a list of selected devices will also be part of the beta testing program (probably from beta three onwards) to help improve the final version.