You're forgetting Namine. And let's not discount Demyx, since its hinted that he also came from the time of UX. Though we don't know what's become of him, we can assume he's still with Ienzo and Ansem The Wise. I do find the inverse of numbers very interesting though. And what's more surprising is that 5 of the now 7 Darknesses were supposed to be fighting on the side of light (those being Ava, Gula, Invi and Aced). I'm still not convinced that they are on the side of "Darkness" or that the new 7 are even counted as Darkness, since we now have a redemption of sorts with Xehanort. Of course, its clear there's something uber shady with Luxu/Xigbar, but there always has been with him. I'm still convinced that Luxu/Xigbar may end up being one of the new villains of the new arc outside of the MOM.