https://www.gamespot.com/articles/fortnites-week-9-secret-road-trip-banner-location-/1100-6461632/

Week 9's challenges are now available in Fortnite, bringing us another week closer to the end of Season 5. As usual, there are seven new tasks to take on, and if you manage to finish all of them, you'll complete another Road Trip challenge and unlock a special loading screen. This time, however, the reward is a little different.

While previous Road Trip loading screens would hide the location of a secret Battle Star, which would level your Battle Pass up by one tier when collected, Week 8 and 9's screens point to the location of a free banner cosmetic. If you've kept up to date with all of the challenges in Season 5 up until now and complete the latest batch, you'll unlock a loading screen that features a group of characters gathered around the mysterious purple cube that recently materialized.