Here's a brief roadmap from their Patreon page.
Bannerlord Online update
Current edits:
• Added Event managers. From time to time they will appear on the server and create unique events, as well as give out interesting rewards for them.
• Fixed global chat. Now you won't see messages from...
Right now, it's really just a proof of concept, I think. They have a very brief roadmap, but with the overwhelming amount of support and interest that the team has received, I'm confident we can expect that expanded upon very soon.