First, it was going to happen on April Fools' day, and then on April 18, and then probably some other date in there, as well. But for all the conspiracy theories and prognostication, it seems likely that the biggest singular event in Fortnite: Battle Royale yet is likely finally around the corner. 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.
But while I'm still predicting tomorrow, there are still some questions about just how these three events are going to be ordered: the comet impact, the end of Season 3, and the start of Season 4. Epic has been very clear that Season 3 ends on April 30, but like with the transition between Season 2 and Season 3, the end date for the previous season didn't come with an official start date for the next season. Last time around there wasn't a whole lot of surprise: Season 2 ended and Season 3 began, like you might expect. But Epic is treating this transition very differently this time around, both through its out-of-game teasers and its in-game events. Turnaround time in Fortnite world is 4:00 AM EST, and so it's unclear if April 30 will be the last full day of Season 3, or if it will end tomorrow at 4:00 AM and Season 4 will begin.
I've asked Epic for clarification and will update with any new info.
That brings us to the comet itself, which at this point is clearly serving as the transition between Season 3 and 4, at least in some capacity: there's really no other way to read the "brace for impact" teaser. The thing has already made itself felt through meteors that are currently crashing down onto the island and smashing structures on impact, but the big thing is on its way, and at this point something big is going to happen, and it's going to happen soon.
For a long time, the dominant theory was that comet was going to destroy Tilted Towers. This was based on a few odd hints, from random controller vibrations interpreted as morse code to rough guesses about the thing's positioning in the sky, but mostly it was wishful thinking: Tilted currently plays an outsize role in the game's meta, and plenty of players -- including, no doubt, some who work at Epic Games -- would like to see a more balanced distribution of activity throughout the map.
That theory has been called into question by a recent rumor from Reddit user internetadam, who accurately predicted the Superhero theme before Epic had made any public announcement. 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. Internetadam went on to say that the map is going to get much more regular updates in Season 4, and that Moisty Mire is on its way out by the end of the season. This feels more likely -- an example of Epic "balancing up" by raising the attractiveness of other areas rather than destroying a popular one.