It could be said that Injustice Superman had now been driven to the edge of a cliff. Owlman was only being targeted by Justice Batman; the Supermen did not interfere in the internal struggles of the Batman group, and most Batmen remained neutral. So, in truth, Owlman only had to deal with the small faction Main Universe Batman had gathered.
But even so, the pressure on him was enormous. In the end, he had even been chased into a miserable retreat in his own universe and forced to reveal his trump card to save himself.
Now, Injustice Superman had offended every member of the Justice League's Big Three in one stroke. The Batmen could not accept his mind-controlling Batman, Superman considered it utterly evil, and the protective Wonder Women believed he had killed their sister. On top of that, his reputation had long since been ruined, so even jumping into the Yellow River would not wash him clean.
If this continued, Injustice Superman would have no chance of survival. Batman and Superman might not kill people, but Wonder Woman might. And setting those superheroes aside, if supervillains like Joker learned that he had directly mind-controlled Batman, then he would be beyond saving.
If Joker learned about this, it would be the kind of thing where first-tier ganks became second-tier ganks, then third-tier ganks—send me bot lane and I'll go, give up the jungle, give up the towers, give up the base, even Miracle Worker would stop farming. Today, I'll show you what Black Hand means.
Injustice Superman was indeed a little traumatized when it came to killing Joker. If another Batman suddenly jumped out to stop him, he truly could not guarantee that his hand would not slip and kill him. Then he would really trigger every Bat in existence