What troubled Schiller was Owlman.
Owlman was no good person. He belonged to the evil Batman camp and had always been drawn to Bruce.
Yet he happened to be a police officer. Logically, United States police officers should not have arrived this early. His appearance so soon meant he had other motives.
Schiller was not sure whether Owlman had known Bruce was also in the game when he wrote his backstory. If he had known, he would definitely have found a way to create a backstory that brought him closer to Bruce. That would naturally place him on Bruce's side.
But the identity of a police officer was important. Many records could only be checked at the Police Department, and officers naturally had the right to question people. To figure out what was going on in the village, the easiest method was to investigate directly under the authority of law enforcement.
But if Owlman was also a corrupt cop whose purpose was to silence them, he would cause them enormous trouble.
Owlman was purely a brother-obsessed maniac, and Bruce held every advantage in that regard. Schiller knew that he himself was not particularly good at attracting attention right now. Winning Owlman over would be harder than climbing to heaven.
Since that was the case, he had to prepare for the worst: Main Universe Batman, who had the highest combat power, dying on the spot, while he and Pale Rider stood on the same side to deal with the remaining three.
Do not ask Schiller why he did not join them if he could not beat them. As long as Greed was in that camp, he could never join, because Greed spared no Schiller equally.
With that thought, Schiller stood and said, "How about this? Everyone who can stand goes."
Everyone