I am a product manager at InterSystems looking at our HealthShare family of products. In particular though, given, that I live in the UK I look for features that could form part of our UK Edition of HealthShare. As part of this work I can happily share with you that it is absolutely our intention to support the Care Connect FHIR profiles. Whilst I can not currently give you firm plans and dates our intention at this point it to augment the standard DSTU2 FHIR based to & from SDA DTL's, with ones that also convert to & from CareConnect based FHIR resources.
Associated with that we are likely going to need to extend our SDA model, although many of the extensions we have already looked at are already part of our SDA model. Once the information was in SDA then it would certainly be very easy for you to write a DTL to create a HL7 message. Once we have that our intention would then be to provide a higher level set of transformations from SDA in to & from Care Connect FHIR to support the Transfer of Care and other national initiatives.
However, whilst this is our current intention this could be very easily be changed once our customers start giving us input on our proposed solutions. Therefore if you or anyone else feels like they have anything to contribute to this support do feel free to drop me a mail. I am sure you can get it from DC, but just in case it is firstname.lastname@example.org.
In the mean time I will do some preliminary work on how this could be supported and share that with Mark Massias.