After reading Rabban's post regarding a cancelled LOK game, I decided to perform some research of my own. Brace yourselves...
(click image to enlarge)
(click image to enlarge)]
By investigating my way through the websites of game artist Aaron Hausmann, artist and animator Ranjeet Singhal, and the website of artist Jason Muck, I've managed to establish that Crystal Dynamics were six months into production of a game called Legacy of Kain - The Dark Prophecy before the project was cancelled by Eidos.
The game seems to have been much further along than I had anticipated before it was cancelled. The premise appears to involve Kain between his Blood Omen 2 Warlord, and Soul Reaver Dark-God states.
Damn, I would have played this game!
I created a topic on Neogaf for my discoveries, and thought I'd share them here.