Joomla! 3.7 is still in development but we’re already thinking forward and gathering contributors to work on Joomla! 4. This will be an evolution of the Joomla! series with the goal of improving both user experience and code quality. Joomla! 4 will not be a massive ground up refactor of the code base. The intention is to give Joomla! large functionality improvements with limited backward compatibility breaks.