Road to Robin

During the doomsday clock, there was a quantum shift within the multiverse which caused another Big Bang. During this Big Bang, the bat family was affected horrendously due to trying stabilize the data and energy at the bat cave. All the Robins worked hard to fix it but ultimately we're sucked into a black hole from their existence. They survived but they lived in the real world as one person. Their lives became merged within a fan of Batman of this world. Their universe chose this person because of his spirit, emotional instability and experience. How would they get along? How would this work?