Calvin Beebe, co-chair of the HL7 group responsible for CDA, speaks to the future releases of CDA. CDA R2.1 will probably be finalized within the enxt two years; after that work has finished work will start on CDA R3. By then more will be known about the capabilities of FHIR to express documents - if those are sufficient CDA R3 will likely be based on FHIR resources.
During MEDINFO 2015 in São Paulo, Brazil, a workshop was held with the topic "eStandards - eHealth standards development project: Tools for interoperability - Time for eStandards". Dr Kai Heitmann talked about ART-DECOR to close the cycle of specification, testing and deployment