Batman: Arkham Asylum was recently released in a special "game of the year" edition which allowed players to switch on 3D mode and use cardboard 3D glasses on any TV to play the game in 3D.
The reason I mention this is because on the Blood Stone site, under media, they have a section for 3D screenshots. This could mean anything. It could just mean you can view the screen shot from multiple angles. Or, perhaps Blood Stone will feature a 3D mode??
Well PS3 can do 3D if you have one of those 3D TVs to go along with it - or at least I thought that was required. The 360 has something similar in the works. All the games will technically work in 3D, but they'll probably need to be patched. It's possible that Activision pushed for it as a feature (or future proof feature?) and built it into the budget now instead of patching it later.
That's all assuming you're right about this. I imagine there's a shred of truth here.