On a previous platform I was able to spin up a custom page and populate it with various community widgets and HTML blocks.
For instance, we had a user conference coming up so we were able to create a discussion forum for attendees, resource blocks, fancy artwork (banners, sidebar elements) consistent with the theme of the conference, and general information about the event (more HTML). Once the conference was over we just pulled the page and archived the particular discussion forum.
You could also set the custom URL for the custom page so it worked as a vanity URL
http://community.acme.com/UserConference2021