Joomla 4.2 is expected to be released after 12 months of 4.0 version and after 6 months of 4.1 version. Its main feature will be multi-domain site functionality.
Content Drafting: Allows to edit/change content without publishing yet and publish it (e.g. via the workflow) later.
Health check: A page to check the integrity of your Joomla! files and database structure (also for 3rd party extensions).