Kingdom Hearts II Discussion of Secret Ending

From Left: Axel, Roxas, and Xion
Namine (pretty similar to Xion, right?)
Ven (pretty similar to Roxas, right?)

Personally, I think that there is some connection between Sora, Roxas, and Ven that lies deeper than family or some of the other theories that I have heard.

Considering the second 358/2 trailer, the one featuring Xion, I think that there is somehow a third, fourth really, entity created by those with strong hearts.

Facts:
-Xion, XIV in the Organization, resembles Kairi and is related to her in some way, possibly a second nobody? (from the second 358/2 trailer: actually said)
-Namine resembles Kairi and Xion, and is not in the organization (sorta)
-Kairi's heart left her (it resided in Sora, but definitely wasn't with her[KH1])

-Roxas, XIII in the Organization, is Sora's nobody (KH2)
-Ven resembles Roxas and Sora, and is not in the organization (BBS trailer: Eyes, etc)
-Sora lost his own heart, and became a heartless (KH1)

SO, I feel that there is somehow another entity created when someone with a strong heart becomes a heartless. Heartless, Nobody(Roxas/Xion/etc), Second Nobody?(Ven, Namine), and the original person.
This would explain most of the Ven problems, except that with Namine/Xion, their hair is essentially reversed (blonde/black), but perhaps that has some deeper meaning?


Also, as a sort of disclaimer, I do not really have any names worked out for what this perosn would be called, nor do I know a lot about the 358/2 backstory, or what of BBS has been released, but this is my theory on Ven (and somewhat on Xion)

 

the guy that was frozen was not roxas. it was ven, who looks similar to roxas.http://www.kh-vids.net/images/icons/icon10.gif