Hasselblad have officially now said that they are developing an H series T&S lens.
Incidentally they've also made an announcement that there will be a waist level finder for the H body at Photokina, the slightly bizzarre explanation for the timing of this accessory is that they say it's only now with 39MP backs that a 645 WLF finder has relevance, in that 39MP allows a vertical crop from a horizontal camera. Contax had a 645 WLF from the get go, and wasn't there a Bronica WLF that pivoted, so it still worked even if the camera was in the vertical position?