Michael had always planned to visit the Tritan Alliance again before it was too late. Not much has linked him to the Tritan Alliance anymore, but it was where he grew up and met many interesting people. Michael was curious how much the Tritan Alliance had changed after he left it with enough support for them to stand up for themselves.
Michael could visit the Tritan Alliance again since he was not yet a full-fledged Divine Lifeform. Maybe he could return in a few hundred years, once the Torn Firmament was back at full power, but he was fairly sure to never return after this time.
Entering the Tritan Alliance hadn't been that easy for Michael and Alice. Michael was already stronger than any Higher Lifeform, which was something the Torn Firmament showed openly. His Divine Shell, the presence of his Divinity Fragment, and the three God Curses put tremendous pressure on the Torn Firmament.