I just started playing it today. 7 light 13 darkness. PLEASE LET IT BE WHAT I THINK IT IS! PLEEEEEEEEASE!

Basically the 13 darknesses are just another Organization 13 >.>
They made it pretty obvious that the organization members that weren't shown in the lab are going to be Xheranort's vessels. I personally counted 11 possible members, they are missing a 13th member, so only 1 member is unknown to me :/

they werent in the lab cos you go back to the place you became a nobody in, thats why 9-12 arent in radiant garden :P

*Finally bothered to beat Jullius*
>.>... Damm.. He's actually very easy once you figure out that Balloonaga depletes his health bar fast.

Argh.....so tempting to get the game and a 3DS right now.....must wait though.....patience.....