Superhero origins are usually the grounding of the character people use before the spring off into the supernatural stuff. Batman deals with grief, the Ray loses his father, green lantern is presented with a choice to uphold some virtues, wonder woman is trying to protect her family and home, Constantine has regrets, X-Men deals with bigotry, Spider-Man has unearned power, etc.
Tell the story you want to tell, but consider why you want to tell it the way you want to tell it and if it will reach the people you think will be fans of it so you can keep making more.