Five years after the Battle of Yavin, members of the Central Committee of Grand Moffs used the stadium as a platform to consolidate their power and promote a new heir to the Galactic Empire. Members of the Senate Planetary Intelligence Network learned of this secret meeting and sent a disguised C-3PO and R2-D2 to Kessel on a fact-finding mission.
At the secret Imperial convention, Grand Moff Bertroff Hissa presented, Trioculus, the mutant "son" of the late Emperor Palpatine to the masses. Trioculus declared himself the rightful ruler of the Empire and demonstrated his power by blasting a critical Grand Admiral and Royal Guard with a lethal dose of Force lightning.