User blog comment:The Koromo/Crossover Battles We'd Like to See but Will Never Happen Outside of Fanon/@comment-4708535-20130103035523/@comment-5286626-20130104014251

but other charcters aren't entering the one piece world... nor would the one piece characters be entering  the other character's earth... they'll just  simply fight in a far away galaxy never to be seen of or heard of again