Master Chief is now available in Fortnite through the Item Shop.
Among this set in Fortnite is the Master Chief Outfit, available individually or in the Master Chief Bundle with the rest of the set.
Here's more from Epic Games:
In battle, make your landing with the UNSC Pelican Glider, a miniature Pelican carrier. And cover your back with the Battle Legend Back Bling, a holographic Elite skull which serves as a trophy of the Chief’s exploits.
Also, when harvesting, batter-like a Brute with the Gravity Hammer Pickaxe. Plus, with the traversal Lil’ Warthog Emote, you can take a mini-M12 Force Application Vehicle for an off-road or on-road drive in the game.
When you play a match on Xbox Series X/S after purchasing the Master Chief Outfit, you’ll unlock the Outfit’s Matte Black Style.
Plus, you can also slip into Fortnite Creative for a recreation of the classic multiplayer map Blood Gulch made by Atlas Creative where you can play Capture the Flag. You’ll be able to find the island at the Featured Hub.