It’s true that the Joker has a lot of sarcasm in him, and a serious sense for dark humor, but that side of the character has been pushed to the back recently as the latest films in the series have been making him more and more deranged and psychotic, leaning towards the darkest corners of his personality.
The new portrayal of the character could also be something in the middle, and according to many fans that would actually be the most interesting option. A Joker that’s sarcastic and never serious, but at the same time shows obvious signs of a darker personality.
That would still be somewhat similar to the portrayal of the character that we saw from Heath Ledger, but it could be done from a slightly less serious angle. Hopefully, Jared Leto as well as those responsible for his presentation are going to listen to what fans want to see, and try to explore alternative aspects of the character that we haven’t been seeing much of lately.