new locations

There are several new locations this season all with their own unique perks. The three main locations added to the game include Supernova Academy, Demons Domain and Utopia City.

This video by Top5gaming showcases the new locations aswell as sevaral other thing added this season.

New weapons

Fortnite Chapter 6 Season 3 features a mix of classic and new superhero-themed weapons, like the Spire Rifle, Killswitch Revolvers, and Myst Gauntlets. New utility items such as Krypto Treats and Bass Boost add fresh tactics, while weapon choice depends on your range and playstyle.

There are many mythic/ unique weapons that were added this season such as: The Winshot Grappler, Enhanced spire rifle, Bass Boost, Storm Beast Pompoms, Enhanced Fury Assault Rifle, etc...

upcoming

There are several items which are yet to be added too the game such as Supermans mythics and potentially more.