Even in escapist fiction, there is a bit of reflection of actual life in the work.
Death is part of life and should be reflected in any literature.
As far as rules for death or whether or not it is okay to resurrect characters, the creators and companies can do as they see fit and I as a consumer can choose to support those decisions through my choice of purchasing the product they produce.
Anyhow, those are my two cents.
Pull list: Afterlife with Archie, Bodies, Chilling Adventures of Sabrina, Coffin Hill, Dead Boy Detectives, The Fade Out, The Goon, Harley Quinn, Hinterkind, Iron Fist: The Living Weapon,The Maxx Maximized, Miracleman, Ms. Marvel, Multiversity, Rasputin, Rocket Raccoon, Sandman: Overture, Silver Surfer, The Walking Dead, Wonder Woman