To rant a little more....
Nolan's Batman movies did insanely well because it stuck to what Batman was in the comics, more less, the DNA stayed the same, the dark side of it. It wasn't turned into some joke, as a matter of fact, they tried that in the past with Clooney and Kilmer and almost destroyed that franchise for good. Keaton had a good balance of some snark/campy-ness/and broodiness all blended at the right balance with some amazing supporting cast members. But the Bale/Nolan movies were fantastic because they were more rooted in some realism with what he did and it was more serious. Batman is serious. Superman is for the most part, serious, but a dorky boyscout serious, Wonder Woman is serious in the "I can and will beat you men if you annoy me" kind of way with some sass.
To try to be more like Marvel because it makes money is horse shit.
f*** the people at WB that forced that.
Aquaman being funny is fine, but I bet Wan's movie won't be, it'll have some fun humor stuff, but it won't be jokes like Marvel movies and that's good.
GOTG1+2, Ragnarok, Deadpool (Fox/Marvel), all funny and great stuff, but that's been their source material. Thor has been serious and funny and sometimes both at once.
JL? It's always been more serious, a "let's save the people, the people are who we want to save!" and then some funny interactions that are more "oh he was being sarcastic? damn it."
You'd think WB would learn from the Schumacher crap, but nope, they didn't. Let Marvel do what works for them and man does it work insanely well for them because it works for the characters they've created that way.
DC can't do that, their characters were never like that, to suddenly change that is like making Tony Stark as dumb as Hulk (when Banner is Hulk I mean).