Oh no! What could have driven this brother to hurt his own dear sist...brain magic. It's established, that mind control exists in that world. He vanished, reappears and attacks. What else it there to know? Move on.
Also, even if there was a famous shinobi character called Sasuke before Naruto, if naming a shinobi character Sasuke brings about such a hilarious shitstorm of edginess, you might want to pass on doing so. It's a landmine and it is obvious. And you really shouldn't do that hairstyle either.