BigWilliam - Wait they had 3 Jokers?
Yes. Maybe. I have no idea.
It wasn't until Justice League #50 that readers learned what Batman already knew. According to the Mobius Chair "There are three". Three Jokers! It was a revelation that sent waves through the DC Comics fan base. But as DC enters the second year in Post-Flashpoint continuity, none of the Clown Princes of Crime have graced the pages of DC Comics. And The publisher has remained tight-lipped about when that might change.
Until this weekend. At C2E2 in Chicago, fans got some answers during a Batman Q&A. When asked when readers can expect an answer to the three Jokers question, Batman group editor Jamie S. Rich replied "It is underway... Jay Fabok is underway on pages now. There are some scripts from Geoff [Johns]. It's coming."
Read https://www.nerditherefirst.com/new-clue-in-three-jokers-mystery/ for one take of the whole story. I'd google for more, but this makes my head hurt.
One other important note, that article was from April, 2018 - less than two years ago.