Unless Hassy agrees to this, and I don't think they would, this would put the relationship btw the 2 companies seriously at risk. This is not going to happen.
Cheers,
Bernard
There is nothing that Hasselblad can do to stop them doing so... there is no "patent protection" or "rights" for lens interface communication...
Perhaps Hasselblad's choice to address on a different maker for the X1D lenses is related to them knowing that the GFX was coming....
Lets not forget that HC lenses where also marketed as Fujinons in the Japan (and other far east) market(s). Hasselblad may of course decide to then get another provider for future H lenses, but I very much doubt they would want to do so... Lets not forget, that there is nothing stopping Fuji as to continue making lenses for the H system even if Hasselblad decides on a different provider and that Fuji is most probably aiming for high volume for the GFX (maybe 25K units annually?) and that could be very good income provider for Hasselblad as it could then widen the lens market for the H system (which is less than 1/10th for production volumes) considerably...
I think that both makers could benefit substantially if such an adapter would be available....