Chapter 6 of Naruto Gaiden: the 7th Hokage and the Scarlet Spring has just landed and it started off with an all-out battle between Sasuke Uchiha and the mystery man, who later introduced himself as Shin Uchiha (which means he has similar names with his son, AKA the Boy with the Sharingan!?).
Possessing the power of the Sharingan and Rinnegan (the most powerful dojutsu known in the ninja world, Sasuke easily overwhelmed the Akatsuki duo of Shins to the point that he was about to BBQ them with his massive fireball jutso. To everybody's surprise, the man managed to avoid direct hit by using his son as a shield.
The man later revealed that he's Shin Uchiha and he has been trying to recruit a fine shinobi like Sasuke for the rebirth of the new Akatsuki. Sensing danger in their new enemy, Sasuke told Naruto to protect the children as he tried to go close combat with Shin.
Unfortunately, it was too late to run away, as Naruto noticed that he was already stabbed by Sasuke's Katana. They then figured it out that Shin has the power to control any tools he touches, including the katana which was believed marked during their initial confrontation. However, when it seemed Shin Uchiha had the upper hand in the battle, Sakura came out of nowhere and delivered a powerful punch to his body.
Seeing Sasuke and Sarada together for the first time, Sakura appeared on her way to confessing a big secret to his daughter, when Shin activated his space time jutso and abducted the Leaf Konoichi in the process. The renegade Uchiha transported Sakura to his hideout, seeking her expertise as a medical nin after absorbing serious beating in the fight.