Laravel v9 will be the next LTS version of Laravel, it was scheduled to released around September of this year, but the Laravel Team decided to push this release back to January of 2022:

 Laravel uses a variety of community-driven packages as well as nine Symfony components for a number of features within the framework. Symfony 6.0 is due for release in November. For that reason, we are choosing to delay the Laravel 9.0 release until January 2022. By delaying the release, we can upgrade our underlying Symfony components to Symfony 6.0 without being forced to wait until September 2022 to perform this upgrade. In addition, this better positions us for future releases as our yearly releases will always take place two months after Symfony’s releases.

This will also push future major releases back as well, and here is the schedule going forward:

• Laravel 9: January 2022
• Laravel 10: January 2023
• Laravel 11: January 2024

The major change in laravel 9 is  PHP 8 is  the minimum version. Since Laravel 9 will require Symfony 6.0 and it has a minimum requirement of PHP 8 that means Laravel 9 will carry this same restriction.