Ellis doesn't carry around the same abject hatred of superheroes that Ennis does, but he doesn't like them. It's not malicious, they simply don't interest him. The love letters in Planetary are to superheroes-as-explorers in the Fantastic Four's mold. But what did he do with the actual Fantastic Four of his reality? They're damaged, crazy, a**hole villains. What was his Iron Man run? A savvy political thriller featuring Iron Man as the obsolete model vs. the true bleeding edge of technology. What was his Thor run? He had an overly ambitious human rob the entire Asgardian pantheon of their godhood. He writes a lot of superhero stories, yes, but he tends to turn the established ideas about those superheroes on their heads to make them interesting to himself. You'll probably never see Warren Ellis just crank out a traditional, conservative, well-written story about any superhero because, as he's mentioned in interviews, they're not interesting to him.