I will answer based on the assumption that you mean written for adult readers not kids, rather than XXX stuff. If you can stand some sacrilege try “Preacher”, its a.
Having grown up reading superhero comics, I still love the genre as a . and sophistication and healthy heaps of adult themes, gore and sex.
Can we call time on superhero films? Films which are too dark for kids the comics were originally written for, yet too dumb for any thinking adult.