Taicang ultimately became a part of history, and the future of the Domain was the Great Wilderness Domain.
Just as Tian Zi had said, with Taicang fallen, Great Wilderness would rise. Since the Heavenly Dao had already been established, it naturally had to grow stronger, and so did the power of the Great Wilderness Domain.
Those who followed Taicang, like Old Man Xiao, had deep feelings for Taicang. It would take some time before they could accept the change to Great Wilderness.
However, Tian Zi's identity was extraordinary, more closely associated with Taicang, and cultivating the Heavenly Dao provided a path forward, a constant increase in strength, and a chance to seek revenge for Taicang.
Thus, people like Old Man Xiao would no longer resist.
After all, Taicang had already fallen. What did it matter if the Domain changed names when they could avenge Taicang?