Une apparition attendue

Drawing on the immense energy lost in Goku and Vegeta's fight, the seal encasing Buu is finally broken. Scared of reliving the horror he witnessed centuries ago, the Supreme Kai insists on retreat. But Gohan refuses, launching an incredible series of energy attacks. And when the shell opens, nothing is inside! Gohan, however, knows it's no time to celebrate.

(Source : Kitsu.)