If you compare Justice League with Batman v Superman, you'll notice that the movie is injected with twice as many jokes, a lot of them coming from Ezra Miller's Barry Allen. Like every movie, a lot of material ends up on the cutting room floor, and Miller shares his favorite joke that didn't make the film.
Talking to Gamespot, Miller shared that Batman had a line that he loved but had to be cut because the movie was only allowed a certain number of curse words. He explains:
"There's a line that I miss from the film, that I wish was in there, [Aquaman] throws that thing against the wall in the Batcave, and [Batman's] original line was—I think now he just says, ‘Hey. Don't do that.' But the original line was, ‘Hey. Don't do that. A lot of my shit explodes.'"
It would have been the perfect thing for Batman to say, and I think it's a waste of a great one-liner. I can already imagine the memes and the shirts that would have been made out of "A lot of my shit explodes." What's more, I think it's a classic line for Batman who's usually a loner and doesn't like people playing with his stuff.
A lot of people are praising Justice League for its lighter tone, but personally I think it's a step back thematically when it comes to the genre. Though BvS certainly has its faults, you can see all the ambition that Snyder had behind it. With Justice League, it feels more like a straightforward superhero film. That's why a lot of fans have started a petition for the release of Snyder's cut of the movie—complete with Junkie XL's original score.
We don't know if we'll eventually get the Snyder-cut of Justice League, but the Whedon cut is now out in theaters.
See Also: Zack Snyder Has NOT Seen Justice League