If weak, it would be fine; the various forces in the old land might still compete with each other, and there might be a chance to breathe.
But unfortunately, the Source Star is very powerful.
As long as the strong ones in the old land aren't foolish, they will likely unite to deal with him first, rather than causing internal strife.
Facing a multitude of Twelfth Realm cultivators, Wang Sheng couldn't guarantee the outcome.
So he had to make more preparations.
Whether it means becoming stronger or preparing backup plans.
Causing chaos within the old land could largely disrupt those strong ones' plans and also enhance his own strength.
Therefore, Wang Sheng wouldn't give up.
As long as the plan to invade Newborn Land from the old land isn't canceled, he and some of the strong ones from the old land would be natural enemies.
Even once those planning to open the passage succeed, it would likely face all the Twelfth Realm strong ones from the old land.