I am definitely in for this.
I love the presentation of my Sennheiser open-back reference headphones. Also, both Koss ESP-950 and the new STAX advanced-lambda presents clean, fresh, and sensitive-touching sounds.
A revive of HE 60 could bridge both worlds. It is a product we looking for so long.
Sennheiser should not be worried the revived HE 60 would disrupt their higher lineup (HD800, HD800S). The sound of electrostatic headphones are still vast different from HD800 series. The HD800 series holds a lot of benefits and advantages on their own.
A lot of us will still keep our HD800(s) and looking for the HE 60. It is a total different kind of animal. And we really want to experience it.
A good electrostatic driver unit is sure to be healthy for the circle. Even if the headphone only comes alone with a STAX pro-bias adapter/ending would be sufficient. A good driver unit is not that difficult/expansive to find. Plus, you would probably not planning to take them out for a sightseeing anyway. Once you join the electrostatic world, you would find a 5-pin 580V not that rare, and your investment into a reasonable driver unit would benefit for years.