[Western Crossover] The Gatekeeper Makes a Break for It

I have an outline and time. All I'm missing are comments from enthusiastic readers.

Guard the world's big ↑ gate ↓!

The mysterious protagonist KP, guardian of the world's gate and its GM, awakened to his powers and decided that his duty was to guard the world's back door, so uninvited visitors from other worlds couldn't wander around in his. And while he was at it, he'd protect Earth, then Gotham, too.

Gotham: Another peaceful day.

World: KP, you've had the Joker locked up in Arkham for three months.

KP: Has he learned his lesson?

World: No. He's been sobbing and insisting that he was only trying to protect Gotham, and that his punishment is too harsh.

KP: It's getting cold. Let the Joker's ashes blow past the windows and doors of my old home.

Gotham: Another nuclear-peaceful day.

World: KP, just as you ordered, the bodies of the visitors from other worlds have been arranged by the entrance to spell out "Get out of my world."

KP: Are there still reckless fools willing to break in?

World: Yes. Several have arrived, and they're all at Wayne Manor. Every one of them says he's the best Robin.

KP: F○ck Batman! I'm done!

KP storms out.

Theme: Face this messed-up life head-on and make it a life worth living.