Tomorrow, on Saturday, September 21st, according to DC Comics'marketing department, is Batman Day. Participating comic book stores will have giveaways of reprint Batman comic books, as well as a variety of comic book ephemera.

Bleeding Cool also understands that DC Comics will take the opportunity to announce the new writer of the Batman ongoing comic book series, after Tom King was fired. King's final issue will be in December, with Batman #85, before his run will spin-off in a truncated form in the Batman/Catwoman series running through 2020.

And maybe if you're very good, you'll hear more about what 5G is. That's if anyone at DC Comics admits to its existence. I'm looking for Jim Lee to draw it on a T-shirt worn by a background character in one of his comics, that's how things are usually done.

Here's where your local Batman Day event is happening:

If you are visiting one of the participating retail locations, pick up a Batman Day Special Edition copy of Batman: Nightwalker or The Batman Who Laughs #1 with a Batman Who Laughs cut-out mask.

The big one will be Scott Snyder, James Tynion IV, Peter J. Tomasi and Brad Walker for a panel discussion and signing at Barnes & Noble Union Square in New York at 4 pm. Might that include the announcement of the new Batman writer? Note an absence of Tom King…

Until tomorrow, here are your speculative runners and riders of who will be the new Batman writer… we'll know as soon as you do.

UPDATE: Or sooner – we're now calling it as James Tynion IV. All bets are off. But here's what we originally ran:

Tom Taylor – 2:1 He's been given some of the dregs of DC Comics to work on and turned them into gold. From Injustice: Gods Amongst Us to Earth 2, he has put in the grunt work, his series DCeased is a massive hit, and his recent comics for the competition, especially Friendly Neighbourhood Spider-Man have been standout. He also seems happy with the plates he is given, rather than asking for more gruel. And even works happily with LucasFilm on Star Wars comic books – not always an easy ask.

He's been given some of the dregs of DC Comics to work on and turned them into gold. From Injustice: Gods Amongst Us to Earth 2, he has put in the grunt work, his series DCeased is a massive hit, and his recent comics for the competition, especially Friendly Neighbourhood Spider-Man have been standout. He also seems happy with the plates he is given, rather than asking for more gruel. And even works happily with LucasFilm on Star Wars comic books – not always an easy ask. Brian Bendis – 3:1. It could very well be him. Or is he lined up for Batman #100? Bleeding Cool ran the rumour that he is involved with the choice of Bruce Wayne's replacement as Batman – and #100 would hit in the summer of 2020… but could he be on sooner than that?

It could very well be him. Or is he lined up for Batman #100? Bleeding Cool ran the rumour that he is involved with the choice of Bruce Wayne's replacement as Batman – and #100 would hit in the summer of 2020… but could he be on sooner than that? James Tynion IV – 4:1. Scott Snyder protege, he has been writing Batman in Justice League and Detective Comics, time to step one level up? His Batman/Teenage Mutant Ninja Turtles went down well too.

Scott Snyder protege, he has been writing Batman in Justice League and Detective Comics, time to step one level up? His Batman/Teenage Mutant Ninja Turtles went down well too. Josh Williamson – 5:1. He has, for his sins, written four issues of this run on Batman as part of continuity crossovers. Got to be in with a shot.

He has, for his sins, written four issues of this run on Batman as part of continuity crossovers. Got to be in with a shot. Peter Tomasi – 7:1. Already writing Detective Comics, it would be an easy jump.

Already writing Detective Comics, it would be an easy jump. Joelle Jones – 10:1. Her work on Catwoman has been well received, and working with Tom King on previous issues, with Catwoman spinning out from the not-a-wedding, this would be a strong continuity candidate.

Her work on Catwoman has been well received, and working with Tom King on previous issues, with Catwoman spinning out from the not-a-wedding, this would be a strong continuity candidate. Tim Seeley – 12:1. He managed to get some blood out of the absence of a Batwedding

He managed to get some blood out of the absence of a Batwedding Kelly Sue DeConnick – 15:1. If Brian Bendis doesn't take on the book straight away, one of the creators he brought into DC Comics might. And Kelly has to be favourite ahead of Matt Fraction…

If Brian Bendis doesn't take on the book straight away, one of the creators he brought into DC Comics might. And Kelly has to be favourite ahead of Matt Fraction… David F Walker – 17:1. Working well with Bendis on Naomi. We know he has big plans. Could this be one of them?

Working well with Bendis on Naomi. We know he has big plans. Could this be one of them? Bryan Hill –20:1. He's been writing Batman And The Outsiders – which had a rocky start but is now on track. Could he get the call to be an Outsider no more?

He's been writing Batman And The Outsiders – which had a rocky start but is now on track. Could he get the call to be an Outsider no more? Matt Fraction – 25:1 . See Kelly Sue above.

. See Kelly Sue above. Brian Azzarello – 30:1 . Maybe DC Comics has forgotten about the Batpenis. Damned has sold very, very well for DC.

. Maybe DC Comics has forgotten about the Batpenis. Damned has sold very, very well for DC. Mark Russell – 35:1 . If they thought Tom Taylor was esoteric Eisner bait, then you ain't seen nothing yet. Also, he likes cartoons as much as Tom does…

. If they thought Tom Taylor was esoteric Eisner bait, then you ain't seen nothing yet. Also, he likes cartoons as much as Tom does… Priest – 40:1. They offered him Bateditorship in recent years and he said no. How about just writing Batman?

They offered him Bateditorship in recent years and he said no. How about just writing Batman? Sean Murphy – 45:1 . He has his own Batman continuity to take care of. Is there anyway DC could persuade him to merge the two?

. He has his own Batman continuity to take care of. Is there anyway DC could persuade him to merge the two? Cecil Castellucci – 50:1. Strong on Batgirl but Female Furies may have dampened her odds. Also, she has novels to write.

Strong on Batgirl but Female Furies may have dampened her odds. Also, she has novels to write. Scott Lobdell – 60: 1 . An outsider, but his work on Red Hood has received much praise of late.

. An outsider, but his work on Red Hood has received much praise of late. Ram V – 70:1 . White Noise writer of These Savage Shores, he's been writing Batman Secret Files and Catwoman to acclaim. Maybe one for the future?

. White Noise writer of These Savage Shores, he's been writing Batman Secret Files and Catwoman to acclaim. Maybe one for the future? Scott Snyder- 80:1 . Tomorrow's Batman: The Last Knight On Earth is meant to be his final Batman story, and it might take a lot to drag him back. Snyder has his plans for the next two years for creator-owned and Justice League projects. He has been reluctant to step in, and previously offered himself and his DC projects up as utility players to tie to events alongside Tom King's plans. But that was all. Not going back…

. Tomorrow's Batman: The Last Knight On Earth is meant to be his final Batman story, and it might take a lot to drag him back. Snyder has his plans for the next two years for creator-owned and Justice League projects. He has been Dan Jurgens – 90:1 . Beyond odds.

. Beyond odds. Frank Miller – 100:1 . It's still a monthly book. Forget about it.

. It's still a monthly book. Forget about it. Geoff Johns – 500:1. Seriously forget about it.