The Maelstrom, as the map and season is called, promises streamlined progression for every player, making it easier for new players to focus on getting set up and offering more player encounters for those who have more experience. That said, this new map is replacing the old one and so will require full server wipes. Speaking of servers, there will be only one global PvE server for the time being, while PvP servers will be region specific.
The Atlas servers will go down at 11:00 p.m. EDT for about 45 minutes in order to apply the update, and patch notes are expected at that time.
The new ATLAS journey begins July 3rd @ 8 pm PDT on both PC & Xbox! Our brand-new & reimagined World Map: Season 4: The Maelstrom will go live & replace the original ATLAS World Map.
— ATLAS (@sailtheatlas) June 30, 2020