Nobody at Warner Bros. is going to be laughing about this weekend’s box-office totals. There are two two more days, including one big night, left to go, but so far Joker: Folie à Deuxis showing every sign of suffering a historic collapse at the box office. According to Deadline, in its second weekend of release, the Joker sequel “is posting a -82 percent freefall of with around $6.7-$7M per industry estimates.” Those numbers would make **Folie à Deux **he absolute worst hold for a DC character movie in the history of the brand on the big screen\.” Generally, hits decline less than 60 percent f…