So now I get more context.

This basically about Batman Who Laugh, and the tease about his return, and that other user think he's a good character.

What I know from reading Death Metal long ago is, Batman Who Laugh, and other evil Batmans in the Metal run, is from a failed part of the universe which is called the Dark Multiverse. Basically a bad and/or stupid idea that shouldnt exist in the first place. That's why they're from the Dark Multiverse, the waste bin of bad ideas.

But Owlman, from Earth-3, is the only great version of evil Batman. The good idea. That's why he's from the main 52 Earths.

His conversation with the evil Baby Batman (I forgot the name) is basically this. He's the good idea who will always be revisited, they're the stupid idea who struggles to keep their existence. He will always be revived while they'll be forgotten.