Noticed this in the new ISU Council communication (https://www.isu.org/inside-isu/isu-communications/communications/20654-isu-communication-2234/file):
8. Challenger Series in Synchronized Skating
Based on a proposal from the ISU Synchronized Skating Technical Committee, the Council decided to support a Challenger Series in Synchronized Skating starting with the season 2019/20. Details will be communicated in due course through a dedicated ISU Communication.