you just know Riku's going to fight him
bcuz........... Riku's getting the best scenes in this game
There is that one scan, that shows Riku in the flyer that Flynn, Quorra, and Sam go into to cross the Sea of Simulation, so I don't even think Sora will be there to watch Rinzler/Tron fall into the Sea.
I feel like Riku's story will be more so movie based, while Sora's is gonna have essence of both an Original plot with some Movie plot.
Did that need spoilers...I just wanted to be safe in case.