I used to like the Whedon style, but now I hate it. If you want really good works that embrace the stupidity of comics, I would recommend the old 60s Batman starring Adam West, or it’s modern contemporary Batman Brave & The Bold. Both just go balls to the wall in their insanity and feel a lot smarter than most MCU productions. The problem with the MCU is outside of occasional films, they really are this repetitive in-between of the 2000s “cool heroes” and the campy. They feel to silly to take seriously, what with the constant quips, but they never reach the insanity of comics quite like Brave and the Bold. They are just massively sterilized films made for mass appeal, they have enough comic stuff to not follow a realism template, but they will never go into the full wackyness of comics as it would be too off putting.
To take a guess at what the next trend is, I believe we should look at some modern successes.
I think you are right in saying that war movies will be big, especially after 1917. Horror also seems plausible for a major comeback.
Personally, I think Sonic and Joker will be huge players in how the next decade of films are made. Maybe throw in Spider-verse for animated productions. I think video games could take over as the big children’s trend now that Sonic was such a success. With Sonic and Pokémon, a president has been set that these films could work. If Mario gets a good film, then I definitely see many video game mascots making the leap to the big screen. If I had to guess Zelda, Crash, maybe another shot at Ratchet and Clank?
Joker will definitely set up more mentally unstable loner against society stories. I can see a huge interest in people suffering from mental illness being a focal point for new films. Many will act in making them not completely evil like a Marvel villain, but not romanticized like The Fault in Our Stars. Something that shows the dangers, yet wants the audience to empathize. That said, Chris-Chan movie when this decade?