The information that can be placed to a sideshow panel could be retrieved from external data sources or from the database of the publishing application, and then be presented with pre-defined styling. Instead of latest news of some sort, presentable information could also be e.g some kind of reports and statistics.

Picture 1. Commands to fetch latest news from two different API-service.
Picture 2. Sideshow on a frontpage of a work that uses content list type "Out of ink".
Picture 3. Sideshow on a frontpage of a work that uses content list type "Plain structure".