Flip
WiiChat Member
In my opinion, if there is some "fourth tri-force piece" it would have nothing to do with the twilight realm. Afaik, that is a dark mirror of the normal realm, thus, there would already be 3 dark tri-force pieces in that realm. But meh, I don't know much about the actual story, as they haven't told us much. I'd say a fourth tri-force piece is unlikely. Also, the only reason there is another slot for a fourth tri-force piece in the middle of the tri-force, is because that's the only way they could stack 3 triangles together without it looking stupid.