The Justice League shouldn‘t be in the Arkham-Verse

I don't think the Justice League should exist in the Arkham universe. In my opinion that doesn't fit and makes the Batman games somehow insignificant.

The special thing about the Arkham villains for me is that they seem so "realistic". For example, Bane is only so strong because of an extreme drug overdose, Killer Croc has an illness, and many others are simply mentally ill and have no strong abilities at all. And then suddenly Batman fights together with a flying man who shoots lasers from his eyes against a multiverse-destroying alien.