Quote Originally Posted by Cyanoxide View Post
I don't know if it's intentional or not but after watching that it makes me believe that Tet in some way had the power to make Shiro & Sora in Riku & Schwi's image guiding them behind the scenes of there life up to the point they get to the other world/reality.

I'm probably overthinking it and they're just so similar because they wanted the movie to feel similar but I wouldn't be surprised if later on (if they continue it) we find out that that was the case.
I'm pretty sure it's just reincarnation. They died and were born in another world some many years later. Let recognized them there and pull them back to their original world so they could play their game again with him. I'm more inclined to believe this is not their first go around. I would think they've probably been reincarnated a bunch and Get bring them back to their original world every time. I also really liked Tet's statement about having not won once and then it later being revealed that it was him and Riku having a draw in the last moment.
I'm assuming a few things relating to Tet, granted he literally say "Let's keep this game going." I assume that it Tet's ultimate objective, he doesn't want to lose and he doesn't want to win. He want "The Game" between him and Riku to go on forever because it's fun. Riku is good and does unexpected things. Let is the stronger player, but Riku paired to Schwi make for an interesting games. Plus, Riku & Schwi are the only two people in the world that were "worshipping" Set and belief is supper important to Japanese deity mythology. Let literally exists and wins because Riku believes that hard enough. I'm pretty sure that's part of why Tet "answers" Riku's prayer in the end.