After you lectured Dongfang Chiguo Tianwang, you learned from him the specific location of the Heavenly Court, and also that their confrontation with the Western Buddhas was not solely about the fate of the Heavenly Court but to fight for a chance at survival.
At this time, though the Heavenly Dao had been restarted, it was a Dao that had already experienced death once. Its original vitality was not as before, and at this time, the whole world had become very strange. What would happen in the world hereafter, if the previous fall of the Dao would happen again, if this restart of the Dao was merely a brief resurgence.
About these matters, nobody knew, so both the Heavenly Court and the Western Buddhas only wanted to escape this world.
In the Four Directions Mortal World, in the Eight-layered Devil Realm, in the Ten-Layered Demon Sea outside these realms, there seemed to be an even broader universe.