I remember this part. Seymour and Yuna looking at the sphere hologram of Yunalesca making out with Lord Zion....who were both in Zanarkand.

Great scene and it was great how Seymour's plan crumbled. I honest don't think he would have enjoyed being Sin. Seymour likes to be in control...as he is a control freak and I don't think he'd like Yu Yevon forcing him to do things although they'd be things he'd like to do. At least he got a seat at all inside of Sin,although he was already dead...so....his motives kind of sucked and didn't make sense.

I thought Seymour's motives made more sense when he was alive as he was seeking god hood and immortality through Sin, but even still he pursued them after he was dead. Okay, whatever floats his boat.