I just had a couple of great questions come in. After discussing with product management, here are the answers as of the date of this blog post. (Can you guess?)
Question: I want to move courses from one Bb instance to another, programmatically. Assuming I have course exports from the source instance, is there an API to create courses in the target instance?
Question: Is there an API call to export an IMS Common Cartridge from a course.
More detail: Exporting and importing Common Cartridge data via REST APIs are not currently on the 2019 roadmap.
If you have a need for the above, head on over to https://community.blackboard.com/community/developers/learn/rest/pages/rest-api-ideas and rally your fellow developers around these. We may say "no", but not "never"*.