What they came here for is the domain, and they have acquired one. They have to see if they can truly bring it out of God's Domain and use it in the void universe.
That is going to be a long process because they don't know for certain if they can actually use the Authority of the void universe as Origin gods without Supreme Laws or if only world gods can make full use of it.
But even though they are uncertain about the usefulness of the Authority of the void universe, they still want to use the power they have on hand to acquire as much domains as possible.
So it is until Legion-1 returns from his hunt will they be able to determine if this world is worth their continued effort or not.
