From Press Release:
September 27, 2018 – Cary, North Carolina — Fortnite’s Season 6 has arrived! With the new season comes a new Battle Pass, with 100 levels and more than 100 rewards. New rewards include Pets — players can now have a friend watch their back when they drop in!
Additionally, players can embrace the darkness with the mysterious new Shadow Stone consumable and they can explore an updated map that includes floating islands, a spooky castle, and more surprises.
More details on Fortnite’s 6.0 update can be found here.