Thread:Uncanny X-Factor/@comment-27816990-20160509065102

So I have a future project called Earth-15 where I make stories using 15 superhero tropes. The problem is, Earth-15 is already a canon Marvel earth. It's kind of obvious that I can't use it, but since Marvel never expanded their Earth-15, maybe I can use the number? If not, maybe you can help me again choose a number. Thanks. 