https://wccftech.com/android-11-developer-preview-teased-by-google-page-now-removed/

We are well aware of the fact that Android 11 is nearing the reveal of Developer Preview, and Google will be releasing it soon. This means that there is something brewing at the company's offices, and just moments ago, Google made some changes to the developer preview site that referenced to the Android 11. However, the change was preliminary at best as the external links were not updated and there was no changelog present either.

However, shortly after Google teased the Android 11 Developer Preview, it was taken down. As a matter of fact, Google took down the entire Developer Preview website, and now the link redirects to the Android 10 version on the website.