Tilted Towers was an infamous landmark from Fortnite's earlier days: a dense, multilevel area with high spawn rates for gear but also plenty of places for enemies to hide, leaving it a high-risk, high-reward drop zone and a natural setting for tense, memorable firefights. It's seen some variations and throwbacks in various updates over the years, but has been MIA for some time.
The official account's tweet with the emoji of a city skyline seems to confirm what dataminers uncovered earlier this month...