Does Jack Atlas became a Dark Signer in yugioh 5d's?

What? No. That's Doubtfully going to happen Jack Atlas. He has the mark of the dragon! He was just possesed or something by Carly. he was jot possedsed by Carly Carly show jack what wood have happen if he last to her so we see jack as dark signer but when jack see that duel is not over yet he go for the win