Star Lord Yisuan was clear that, according to Emperor Monarch's plan, the goal was to draw all the Great Ancient Emperors within this world into the camp of the Heavenly Court, making them a part of it. They were expected to expand the court's territory and contribute their own strength.
However, when this idea was first voiced, not only did Star Lord Yisuan and Fate Controller Star Lord doubt its feasibility, but even the planner himself, Emperor of the South Pole Eternal Life, Pei Xuanjing, didn't believe it was possible.
It was because authority was limited; there wasn't enough to go around for everyone.
If everyone hailed from the Great Ming World, then despite the competition for heavenly authority, given a choice, they were still willing to make one, especially with the indomitable presence of Longevity Taoist Monarch Pei Xuanjing suppressing the current era, this was the case.