Considering the post before yours, this makes sense. Light and darkness are opposites; blue and yellow are opposites. Blue plus yellow equals green, thus a mix of light and darkness. I've never thought of that before. That is truely awesome. =O
Well, no, it's not Saix in the Birth By Sleep trailer, it's Terra. And I don't think we even know what Terra is. But, as I've said before, the yellowish eyes are not a Nobody-specific thing, seeing as DiZ had yellow/orange eyes.
Anyway, I agree with most of you that replied; the yellow colored eyes are probably a symbol of darkness and I suppose we shouldn't read too much into it. Still, it's pretty interesting to me.
I agree with the bit about Kairi's heart in Sora. I had realized that a few hours after posting my post. xD
As for Sunset Hill, that was another thing I was thinking about. Because there is a huge cliff there, and Master Xehanort had created a huge cliff. All it needs is ten years of superb growing conditions for all the trees.
But... isn't this getting a bit off topic? No one told me their thoughts on my theory. >.< Why couldn't Ven be Sora's parent, Aqua Kairi's, and Terra Riku's?
Ah, thank you for the bit about 'Ven'.
I doubt they are fighting at Disney Castle, because for one it would be Timeless River, and two, you see King Mickey appear (NOT in his Timeless River form, so that means Disney Castle was probably built by then). As for the Crossroads, that makes some sense.
And yes, we know that Sora is from Radiant Garden, because, remember, he was in the Tent in Tarzan's world and saw the slideshow of Radiant Garden and remarked that it looked familiar. And (at least in the manga) when he arrived at Hollow Bastion, he again stated that it looked familiar (or something to that effect). As for Riku, well, I wouldn't want to leave him out.
Yes, the topic is Yellow Eyes.
Not exactly, but what I'm saying is that Heartless in general are supposed to be mindless and crave hearts. Xehanort's Heartless, however, could speak and plan and do things and he stole Riku's body. That makes him a special Heartless. And so is Sora: a special Heartless. So basically, when he turned into a Heartless, he continued to be untill Diz and Riku and Namine put Roxas back together with him.
Ah, but Vivi is not an original Kingdom Hearts character so I believe that doesn't matter.
This is off-topic. But Sora was his own Heartless. He's a special case, remember? So he's not like a monster heartless. He's like Xehanort's Heartless.
Well, he took on Xehanort's appearance, so that doesn't nessicarily mean that Riku himself had yellow eyes. But yes, Xehanort's heartless has yellow eyes but I haven't been able to find a screenshot yet.