Dragon Ball Super fans never expected Bardock to pop up in Granolah's arc, but well – even Goku gets surprised some times. The series took everyone back when the Saiyan's old man was walked back into the series thanks to some clever flashbacks. These days, Bardock has become an unlikely star thanks to his surprise comeback,and now one theory suggests Goku's late father is about to leave his mark on Ultra Instinct.