Marvel and DC can go fuck themselves. They don't own the word superhero, superheroes, super-hero, or any such combination of the words "super" and "hero". I love Marvel comics, but I'm not going to buy any more of their issues because they don't own superheroes, or the concept of superheroes, or the word "superhero".
That's like Starbucks coming along and saying "Hey, we own the words 'coffee delight'."
Superhero, superhero, superhero, superhero, and Stan Lee, Joe Quesada, and the rest of the staff at Marvel AND DC? Go suck on a supercock.