Marvel’s speculative What If? series, which examined what would happen if certain famous moments in comic book history went in a different direction, has actually served as a source of inspiration for many storylines that have been produced over the past 20 years. For example, one What If? issue wondered what would happen if someone else besides Peter Parker was bitten by radioactive spider (which will be the topic of today’s Amazing Spider-Man release). So in my most recent ComicBook.com list, I looked at 10 memorable Marvel storylines that were originally born from the pages of What If?