I love Planescape, it is my bread and butter. But, you know, I don't really want WotC to work on it again for the new edition. When 3E came out, I was all for the rebirth of Planescape under WotC, but looking at the current state of WotC right now, I can't say that PS products they put out would be in the best Planescape tradition.
I mean, who is left there who worked on the origional? If you look at the Planewalkers Handbook, in big letters at the bottom is "by Monte Cook." And, he ain't there no more. Looking through my old PS material, I havn't heard of anything by a lot of these people in anything recent, although I might be missing something. David "Zeb" Cook (no relation to Monte) is now freelancing, and he's on a lot of my PS credits. I dunno, I'm just wary of them messing with my favorite setting.
And Faction War never happened. LALALALALALALALALALA