>>103511680I mean if it existed in the DC Universe then it wouldn't be out of the possibility that any of the JL members could learn it. Though the thing about Ultra instinct is that you aren't controlling your body, your body is controlling itself as like a hyper reflex without the need of your brain thinking of the action in the first place.
Not saying Batman cant do it, but I am saying its more likely someone like Supes or the Flash could do it.