There's been a glowing blue comet streaking towards the map for the entirety of the season, and it's almost certainly going to strike in the next two days, likely tomorrow -- at that point it's probably going to either destroy Tilted Towers or Dusty Depot. That's when Season 3 ends, after all, and the comet has served as the grand arc for the space-themed season since the beginning. When the comet hits, something is likely going to happen with the Superheroes that Epic has been teasing for the past few days. For a long time, the dominant theory was that comet was going to destroy Tilted Towers. The user said that the comet would not be hitting Tilted, but would, in fact, be hitting Dusty Depot, which is sort of an odd area anyways.
Source: Forbes April 29, 2018 15:56 UTC