I wonder which Halloween costume will be worn more by kids this year? Ant Man or a murdering Batman or a misanthropic Superman?
		
		
	 
May I remind you the fandom phenomenon that was Ledger as Joker in 2008? Not exactly a character shining with morality.
And Bane, also, in 2012, though not at the same level, did get a big fandom quoting him all over the geeky websites.
My point is that maybe it wasn't Batman who made the last two installment of Nolan series reach the billion prize.
Maybe it was the villains.
Remember that Batman Begins didn't even made 400 million globally?
Maybe people had lost interest because of Batman & Robin, but let's say WB waited until today to reboot Batman with Begins.
If it had been released last week, do you honestly think it'd end at a billion? I wouldn't bet a dime on that.
Not even Nolan could make Inception and Interstellar do it with their quality alone.
Another cause of this huge drop may not be for the movie's quality and Snyder direction (I can't believe both Avengers, Iron Man Three and The Force Awakens are better than this [I haven't seen the movie yet, I want to check it out directly in the uncensored cut]), but for brand and character appeal.
Don't forget that the same Abrams who made Into Darkness and less than 500 million globally, made Episode 7 and over 2 billion.
So, it might be possible that DC characters are now simply less appealing than Marvel's and Star Wars'.