Hello @ikeli ,
Share next-gen project configurations and workflows Coming in 2020.
For teams that want to share next-gen project configurations and best practices, you’ll be able to copy a project, including custom issue types and workflows. Projects will continue to remain independent after you copy them. This will be particularly helpful for teams that want to share next-gen best practices across teams.
Adding a +1 to the questions over clarification on timeline.
I also don't think the accepted answer is actually relevant to the use case, unless I'm misreading. We maintain 40+ next gen projects and routinely have to roll out a new org-wide issue type manually across all of these projects, which is heinously manual. It sounds like the feature in the works is more designed to clone a project to create a new one. Is that not correct?