DC being darker and more adult than Marvel is such an obsolete opinion coming back from the 60' and maybe strenghted by MCU recently but is as far from truth as possible. Both can have dark or lighter stories. And Dark doesn't mean for adults it can by just edgy story for teenagers than think they are so mature. Snyder's movies are good example. They pose as dark and gritty, but are shallow as a puddle with their themes. With comics, it depends on writer how it would be in the end. What is true, however, is that Aliens and Predator works better with more grounded heroes because they don't pose much threat to some of the more "super" superheroes. But I'm interested in how Hickman will work with this problem. Would it be insane Xenos with superpowers, or something more interesting?