A recent Fortnite leak suggests Shadow will be taking over the Agency, and will probably be implemented in the new season. Fortnite Chapter 2 Season 2 introduced the Top Secret theme, and the two set of agents at war with one another. Ghost was in control of the Agency in Season 2, but that's bound to change next season.
And according to data miner iFireMonkey, this won't be the only changes.
Fortnite Leak Hints at Shadow Taking Over the Agency
Besides just the loading screen, the Agency has a location on the map, and while the two factions are at war, it's likely something is going to happen to the map. And after a significant delay, it better be big. It's not a surprise it was delayed because of the coronavirus, but Apex Legends had its new season, Warzone is around the corner, so Fortnite can't be late.
Having the whole month of May in a deadzone isn't great for the Fortnite scene, despite the crazy concerts taking place. At the end of the day, Fortnite is a video game, not an event planner.