A/N: Note that this is an absolute crack!fic and not meant to be taken seriously. But hope you enjoy and please review!
The room opens to a room practically wallpapered with bookshelves and posters dedicated to the Dark Knight.
"Welcome, dear allies of the Caped Crusader!" In a burst of light, arrives none other than- "It is I: Bat-mite! The Greatest Fan of the World's Greatest Detective!" the floppy eared child-like being declares. "Now, I'm sure you're wondering what I'm doing here, as I am not a part of either universe we will be visiting today, but never fear! I am merely acting as the organizer and guide on our trek through the ever-expanding multiverse!"
A/N: Bat-Mite, get on with it! They don't have all night.
"I'm getting to it, Miss Rain!" Bat-Mite shouts at the ceiling of his shrine. He turns back to the reader. "God. Pushy thing, isn't she?"
A/N: (typing furiously) An anvil suddenly appears over Bat-Mite's head.
Bat-Mite barely manages to dodge the sign of the author's disapproval before smirking at the ceiling again. "5th dimensional being, dear. It'll take more than cartoon mischief to get me to leave."
A/N: I could write you out of the story.
Bat-Mite blinks. "Good point. I'll behave." He turns back to the audience. "Anyway, sit back, relax, and enjoy the crossover of two of the most successful Batman franchises ever brought to life on the big or small screens!"
The black armored Batman looked over the Batman in black and gray.
"Not bad," he growled. The other Batman raised an eyebrow.
"Can't say the same. You sound like Dent," he replied. The black clad Batman narrowed his eyes in turn.
"That's what you're worried about? No wonder your city's such a mess."