According to reports, "The Batman" live-action movie, prepping an early 2020 start, will be based on DC Comics 13-issue limited series "The Long Halloween" (1996-97) written by Jeph Loeb and illustrated by Tim Sale:
"...taking place during Batman's early days of crime fighting, 'The Long Halloween'...
"... follows a mysterious killer named 'Holiday' who kills a prominent victim every national holiday.
"Working with 'District Attorney Harvey Dent' and 'Captain James Gordon'...
"...'Batman' races against the calendar as he tries to discover who Holiday is before he claims his next victim...
"...while attempting to stop the crime war...
"...between two of the most powerful criminal groups in 'Gotham', the 'Maroni' and 'Falcone' families.
"Criminal 'Julian Day' knows the true identity of the killer but refuses to share this with Batman.
"He instead taunts Batman with hints from his 'Arkham Asylum' cell.
"The story also ties into the events that transform Harvey Dent into Batman's enemy, 'Two-Face', with 'Scarecrow', 'Joker', 'Mad Hatter', 'Poison Ivy'...
"...and 'Riddler' also involved, as the 'rogues gallery' evolves from mob goons to supervillains..."
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