Lots of data is being produced about relationships over geography and time. MapStory should be able to render these and let users make stories with the data.
The GeoTools renderer does not support this, and indeed it may require some fundamental rearchitecting of the data structures. This type of data is most always done as a relationship between two points, so to render this we need to render that relationship. Or else get the data to be exported in a way that includes georeferenced lines. But I think the idea is we want to be able to import just the points and their relationships, and have MapStory/GeoServer render the relationships, since it will know more about the geospatial components than the exporting data tool.