I'm really ambivalent about this. I don't think I want Planescape: Torment 2.
I wouldn't mind a different story with different characters, based on similar themes as the original game and in the same setting, I think that would be interesting. But trying to market it as spiritual successor, that's not ok with me, Dragon Age: Origins was supposed to be "spiritual successor" to Bladur's Gate, and as much as I liked DA:O, I didn't feel my nostalgia being tickled.
They talk about new Torment, maybe not being based on D&D and probably not Planescape.
What.
For me, those two things were just as essential to the whole experience as the story itself.
"This is Planescape: Torment 2. It's neither Planescape nor second in the series, but you'll be very tormented!"
WotC likes the games to be developed using current rules, so maybe they should hold off on this game until D&D Next comes out. I playtested it, it's much better than 4. I'd prefer it being based on Pathfinder, but that would be even more trouble from WotC because...
The setting. Planescape is not supported anymore. Instead they shove that shitty magiteck down our throats, or even worse, Points of Light. So, maybe it'll be Eberron: Torment?
If they did it on Pathfinder, they wouldn't be able to use WotC settings at all.
Anyway, I'm not really surprised WotC doesn't want a Planescape game being made. It'd make people interested in a setting they don't give a damn right now, and since the complete overhaul of the cosmology they did, it actually has no reason to exist, despite Sigil kind of sort of still being there (what.). Which is sad.
I still house rule it, however.
Ok, my mind went places. Sorry.
TL;DR: Sort of want, but complain anyway.