Zen-Oh Palace
Zen-Oh and the Grand Minister were discussing the matters concerning the Tournament of All Universes. The tournament was primarily intended to observe the general capabilities of the strongest individuals across all universes, in order to gather effective and capable warriors to help face the future conflict with the Demon Realm. That was the first reason.
The second reason was that Zen-Oh had previously promised Son Goku that he would host a Tournament of All Universes to let him fight with all his might. Now, there was a timely opportunity to use the tournament to catch a glimpse of the Complete Saiyan God, a form recorded only in the Book of Ages.
Chapter 203