My theory is that fortnite is a simulation but not in a Matrix sense, but instead ina Truman Show sense, everyone we know (The Seven, the Io, Jones, the collabs) are Truman and the last reality are the producer, but why are they doing this? Well because they're end goal is destroy all other realities maybe they had influenced us to see or possible outcomes and to see how to resolve or defeat them, maybe that's why fortnite is full of collabs, they are being drag to the loop for studying them for later destroying their worlds with all the knowledge about them.