Blizzard has released a bluepost highlighting the split Heroic difficulty Dawn of the Infinite mega-dungeon coming in Dragonflight Patch 10.1.7! Starting at item level 372, each dungeon will feature four bosses, starting with Chronikar to Iridikron, followed by Tyr through Chrono-Lord Deios!
Gather your party and preserve the timeline in the Heroic Difficulty Dawn of the Infinite mega-dungeon with the release of Fury Incarnate.