Sequel...mmmm, rumour has it...
I think that sequels, or at least episodic games, were in the mix.
For instance, after Michael, the firefighter, gives the essence to Roivas, he says "There's something I have to do before they get to me...", then he walks away.
No decent writer likes to leave loose ends like that, so my guess is that they planned on branching out, like "Eternal Darkness: Dark Paths of Edwards" or "Eternal Darkness: Inherit the Rats" (Max's story from underground to sanitarium).
There certainly are enough stories to allow for a few episodes. That, plus a rumour that SK are re-imaging EDSR for XBox 360.... hmmm, could mean good news for us horror fans.
There are so few good horror games anyway.
Eternal Darkness
They Hunger for Half-Life (Manke)
Silent Hill Series (especially 4)
Resident Evil (if you like that junk)
Clive Barker's The Undying (excellent atmosphere, plus a left handed gay hero! Rock!)
The Suffering (schizo story-wise, but insanely creepy atmos and creature design)
Blair Witch Series (demo only, too dull beyond that)
Quake (the first time you get ambushed by zombies rising from the water -- and then they rip out their flesh and throw it at you! Genre-busting that was!)
What other great horror games would you suggest?