Hi Martin,
I have also been particularly investigating a similar scenario. At least I like to think so. If I got you right, you would like to consume data from SAP Hybris C4C in Lumira to create rich visualizations, compose stories and share them. If yes, I might direct you to two ways I apparently achieved to do so.
1. Using the OData API of the SAP Hybris C4C using which you can create a data source in SAP Lumira through its OData connector. You may find more information here: SAP Hybris Cloud for Customer – OData Services
2. Using a beta version of 'SAP Hybris C4C Data Connector Extension' available to download at https://analytics-extensions.enter.sap/sap/aed/Services/protected/index.html
If that is what you are looking for we might further our discussion comparing the two solutions.
Regards,
Neelesh