Bruce isn't a Wayne, doesn't have an all-purpose butler, and has no interest in being a cat-eared masked vigilante in the middle of the night.
Although he has traveled around the world, mastered all kinds of skills, and is quick-witted, that still doesn't justify the Batman Who Laughs dumping him in a parallel world.
As everyone knows, the Batman Who Laughs loves tormenting Batmen with happy lives.
Bruce: What does the Batman Who Laughs picking on Batman have to do with me?
When everyone meets a cheerful, optimistic, energetic Gotham sweetheart, with a lovely smile and a warm, kind heart...
Alfred: Master, you really should learn from the master in the other world.
Wonder Woman: He's so sweet.
The Robins: Dad, got room for another son? One who's been a vigilante, I mean.
Superman: Bruce is the best person I've ever met.
The real Bruce Wayne, Gotham's sweetheart, Batman: Hmph.
Pairing: The real Bruce Wayne, Gotham's sweetheart, Batman.
Yes, that's right, it's selfcest!
Everyone, say it with me: Bat/Bruce is irresistible!
Theme: Long live selfcest