When is the next version update in laravel spark?

I don't think someone on the forum has the answer to that question. The latest release covers Laravel 6.0 which is the latest version. So you should better follow the release notes here

https://spark.laravel.com/docs/9.0/releases#releases

In order to be up to date. Or follow LaravelPHP on twitter for updates.

At the Method Conference that was in March 2020, I talked to Taylor and he mentioned he was working on a new release this summer. It would be awesome if he announced its release at laracon online August 26th...

Actually, I just noticed a v10 released about 15 days ago! Check out the latest: https://spark.laravel.com/releases