If I was to spin this, from my experience watching Anime, he's smiling because he doesn't recognize the man he's become and he's happy a worthy opponent has set him freeHe's happy for breh, but don't let it be known because neckbeards think this is real.
. Probably had a flashback of his childhood and the trauma that changed everything

now take yo ass somewhere to develop better opinions and come back whenever The Rock returns around Summerslam time because he gonna need his number 1 cheerleader



