This goes against the grain for a lot of people, but what makes Rand so special? He's just a thread in the pattern like any other, except the fact he's central to it. The name of the series is the Wheel of Time, and the central concept, good vs. evil spun out over and over again. Good (Rand) gets the recurring hero, lets look at evil.
The one that tipped me off to everything is Demandred's supposed role as Mazrim Taim. We now know that isn't true, but a few years ago the topic was as clear as mud. Look back at the archives to see what I mean. But everyone was comparing points to see yes or no about Taim. The thing no one thought about was what about both being the same soul.
The series always talks about how the Creator making the wheel without regard to how a person lives, because the "Lace of the Age" needs black just as much as white. Perrin makes mention of how he is surprised the Creator would stick good steel and sickly metal side by side. Moiraine also mentions it a few times but the point is that the Creator has no regard to good and evil. He is simply telling the story and stands back to watch. We all know that T'A'R has the Souls of the heroes of the AOL, but what about the villans, aren't they worthy "characters" the Creator may need to tell the story correctly?
Good has recurring characters, why not evil. Stick with me here, In the AOL, LTT fought his war with the shadow and won (or lost depending on your point of view) goes insane and kills himself. Fast foward a few thousand years, and here's Rand freshly spun into the world. The Wheel knows he is to fight the shadow and pulls out the antagonists that he is supposed to fight, and spins them out as needed. Taim and Demandred are just one example.

Look at the black ajah. You'll notice some central themes. Like a healer that loves to kill, and more importantly dish out pain. Sound familiar? Semirage of course. Look at the rest of the Black Ajah and look for some common themes, like a coward who strikes only targets that can't strike back, and has a strong raw talent for compulsion(Mog)sounds like Liandrian to me. Or a stoic teacher thats evil as well. As far as the male forsaken reborn, I'm not to keen on it now, but Look for a skilled swordsman who loves outdoing Rand in anyway(Belial)To me that sounds like Gedwyn as well.

Most people have a problem with the fact the Forsakens souls are still in the world, namely as the Forsaken. Well scale the time back 20 - 30 years. The dragon gets reborn, shouldn't his adveraries be reborn too. The Wheel looks at the board and says the Dragons needs to be reborn, double checks, yep no dragon here, and issues the world a dragon. The dragon needs a villan to fight against, so the wheel looks sees no Forsaken ( all the forsaken are outside the pattern in the seal, remember)and issues the world 13 forsaken.

I wish I had my books handy, currently I am in Iraq, so please tear this theory to shreads, in trying to you will find more facts helping this theory than hindering. And maybe you can find more I can't.