On this alternate earth, the only difference is that the writer has a limited knowledge of batman lore

Chapter 1:

There was once a time when criminals would make peace on Christmas Eve. Time to rest, time to prepare, and time to buy gifts for the kids at the last minute.

But with bosses like penguin and loonies like joker; well, crime doesn't rest. And if crime doesn't rest, then neither does justice.

Of course, it isn't like I don't want to take Christmas off. Take a nap, read a book, go to a Christmas party. I could relax…

But there's no point in dreaming about impossible things. Not while there are maniacs on the loose. Joker and many of the other maniacs are in Arkham, but Ivy, Scarecrow, and Freeze are still out there. I've also heard that Anarky isn't in his cell at Blackgate.

I tune into the police radio, hoping to find a clue as to the location of one of the escapees. I go through a number of radio stations, but one- the frequency right next to the police radio – pops out at me.

"-gas to bring Gotham to ruins! - - - Well, if you're listening to this, you're either Batman or just a very clever eavesdropper. I'm going to assume the former. Batman, it's me, your old friend, Jonathan Crane. Come meet me at the Gotham Royal Hotel. And don't even think about bringing cops; I've got hostages, bombs, and enough fear gas to bring Gotham to ruins!"

No question about it. I'm going. And I'm not bringing the cops, despite my better judgement.

I forgot to introduce myself.

I am Batman.