CineDNG to BRAW ?

Just wondering, if there would be any method of converting CineDNG files from external recorders, or older cameras that record CineDNG internally, in to the new BRAW format?

Betting that would be of interest to owners of BMDCC and Gen1 Pocket cameras.

Maybe in the future.
It's possible for sure, but it's in hands of BM, as there is no public access to BM RAW encoder (only decoding is public).

I haven't seen how to do it in resolve, and maybe it's not available yet, but it seems like BM will have some form of rendering out to BRAW. source -

That is misunderstood:
you'll be able to trim down original BRAW footage into the same format, but no transcoding.

Seems like a lot of the magic to BMraw is directly from working with the camera sensor so I doubt the compression would come out so well if it wasn't working with the sensor on what to keep and what to discard. Might be nice to get a single raw file that you can still adjust wb with but I doubt it'd be any smaller.

If there is no camera info, compression would probably just loose some more detail info because it is mixed up with noise. Constant bitrate compression will compress stuff anyway, having some sensor magic info for that step is most probably irrelevant. What BMD is doing in camera is some processing before actual compression, throwing some other data at encoder should work as expected.

Everything needed to process the image must be in the raw file combined with known characteristic parameters for the camera model, otherwise Resolve would not be able to decode the file.
What would technically prevent Resolve from transcoding any raw file that Resolve can currently decode, such as CinemaDNG, into BRAW? Blackmagic has said that BRAW relies on "partial debayering" (whatever that means). What is to stop that process happening in Resolve rather than the camera software?

You can encode BM RAW at machine stage. If some info which may be available only "inside" camera is not available then in worse case scenario you will get just 1:1 conversion of DNG RAW (of course+ compassion of BM RAW). At leats you will have smaller RAW files and good performance.