Even though I love Planescape: Torment, I don't want to see a sequel to it. That story is finished and doesn't need any additions.
Things I'd gladly kickstart:
- Alpha Protocol 2
- Arcanum 2
Other idea: a Lovecraftian choose your own adventure game with role playing elements using the Alpha Protocol story engine and a Left 4 Dead 2-style director A.I. Played like the "The Dark Eye" mobile java games, but with a dynamic, living world that changes depending on your decisions. Combat is either determined by your character's stats or turn based, but since almost every opponent in a Lovecraft story is way more powerful then a human being, players will need stealth or smarts to survive.
Or just make whatever you want, you guys haven't managed to disappoint me yet.