Course I remember, here's the details of my theory.
Why do Tidus and Shuyin look alike?
(My Theory, that totally makes sense . . . . well, maybe! :rolleyes: )
We know that Lenne is a Summoner, which means she was close to the fayth of the aeons because she is a summoner.
(Just as Yuna was close to the fayth, the fayth & summoner merge to create the aeon - etc...)
Therefore the fayth knew of Shuyin because he was Lenne's lover and Shuyin is close to Lenne.
So, When they dreamt of Zanarkand, Tidus turned out to look like Shuyin, and not the opposite way around.
(And of course, this could make FFX' and the hole dream thing even more complicated

)