Taken straight from the website with the guy's comments:

I've rewritten this so many times and it still sounds stupid [img]i/expressions/face-icon-small-wink.gif[/img] So yeah, the Lee/Sasuke thing. I wanted Lee to be Seraph, but he doesn't get any lines in this trailer, so I messed about with it - having Lee doing the opening lines made the Naruto/Lee battle blend much easier and all, but yes technically it does make it look like Sasuke and lee are both Neo [img]i/expressions/face-icon-small-wink.gif[/img] My bad. Apologies.