i could see something like that happening Death BOO Z

ive come up with some options aswell that could possibly happen.
1. What Death BOO Z said.
2. There fighting pretty evenly and Sasuke does some move (chidori maybe) and hits Narutp sending him into the water. Sasuke thinking hes killed Naruto, gets mastery of sharingan (not mangekyou).
3. There fighting whats seems evenly or one of them has the upper hand and we see outside interference by either Itachi, Jiraiya, Orochimaru, Kabuto, or some other jounin level ninja!
3a. If Itachi sasuke goes to fight him Itachi owns him and takes Naruto to Akatsuki H.Q. while Orochimaro and/or Kabuto comes and picks up Sasukes sorry ass.
3b. If Jiraiya, Orochimaru and/or Kabuto comes in and just manages to get away with Sasuke and then Jiraiya takes him back to Konoha.

there are just some ideas, i wish to hear other opinions also!