Hans asked owners on the mtbr ibis forum a while ago what people would like to see next and a 650b rear triangle to retro fit to the HD was mentioned a lot. If it is indeed a HD 650b I’m guessing it will be more a tweaked HD rather than a new design like the Ripley. Looking forward to seeing it.
Edit. Holy I’ll speak to my LBS again tomorrow and email you what they say if you like.