Even though Michael did everything he could to grow as strong as possible, he was nervous. Only one fight separated Michael from changing the universe forever. It was weird to think about it that way, but that was exactly what the current situation was. Michael would fight the Primal soon, and by defeating them, he would change the universe forever.
Maybe chaos would follow soon after the Primal's defeat, but chaos would be replaced by a calm ocean soon enough. Various gods and other powerful beings would take care of the universe. Maybe they would set up rules for everyone or separate the universe into various sections to guard them separately.
Michael did not care about the path following the Primal's death just yet. He was more concerned about the Primal and how the weave would respond to their deaths. That could transform into an issue, possibly.