I'm waiting for the same thing. Originally it was supposed to be unveiled this November, but it's possible that could be delayed to early 2022. The gas powertrains are the same as on the GV80, but the electric hardware would be lifted from the Electrified G80 (365hp, +500lb/ft of torque, 265 miles or 425km autonomy, 400/800V architecture supporting up to 350kw/h charging from 10-80% of battery in 18 minutes). The 0-60mph (0-100km/h) sprint should also be done in ~4 seconds.
It would support recharging another vehicle (V2L) and potentially powering up some of your home's essentials (Fridge and so on) for a while in case of a power failure, though I don't know if they pushed that aspect as far as on say the electric F-150. Also, I do not know if the eGV70 will come with support for wireless charging like the GV60 (Where you just park over a floor plate to recharge), hopefully they will, or at least offer it as an option.
There's pictures out there of it testing, it has a closed front grille like the Electrified G80 where the right quarter of it opens to reveal the charging port. It looks like it has different wheels which I'm not crazy about but would probably keep for winter tires and get a good-looking set for the summers. The bottom part of the bumper looks different, but the interior should be the same with minor differences in the instrument cluster. No clue how similar or different the color palette will be.
Pricing-wise it should be on the level of V-6 models or higher.
You can guess I'm interested enough to conclude I'm looking at my next car right there...! 😉