[Western Crossover] I Transmigrated as the Batman Who Laughs

As you can see, I transmigrated. In theory, this should be a story about reaching the pinnacle of life and marrying a beautiful, rich woman. But I have to ask... I only cosplayed the Batman Who Laughs at a comic convention! Why did I transmigrate today of all days, after all these years? Couldn't you give me a normal identity? The Batman Who Laughs, did you want me to transmigrate just to get beaten up by the Justice League?

Oh. I can take on the entire Justice League? Hahaha, that's not a problem, then. Wait, you sent me a bunch of Robin dogs? Awesome! Great Transmigration God, I love you!

There may be characters from the Batman Who Laughs universe showing up [but here, Lois and the Batman Who Laughs' Superman are just friends. Jon is actually Batman and Superman's son, but Luthor created him, and Batman doesn't know that. So, for Jon's sake, Lois and Superman got together, though they didn't really become a couple. Anyway, Lois isn't the other woman, and they never married or lived together.]

This is the story of a guy who seems like he has something wrong with his brain, and really does have something wrong with his brain, inexplicably transmigrating!

You ask who the love interest is? Who knows? Don't ask me. I might abandon this story unless it gets popular!

Theme: Nothing in particular, there's just something wrong with my brain.