The Fortnite Battle Bus Is Now A Transformer - GameSpot

This doesn't explain what happens to the bus driver, though.
In Fortnite, players and their friends lead a group of Heroes to reclaim and rebuild a homeland that has been left empty by a mysterious darkness only known as “the Storm.”

Fortnite Chapter 4 Season OG Official Gameplay Trailer

Fortnite's Transformers Crossover Features New Battle Bus Skin

BattleBus, Teletraan I: The Transformers Wiki

The Fortnite Battle Bus Is Now A Transformer - GameSpot

Fortnite: Season X - Official Story Trailer

Fortnite Galactus Event Recap: Here's What Happened During The Live Event - GameSpot

Will Fortnite players be driving the Mech during the live event?

The Fortnite Transformers Pack - Release Date Trailer - GameSpot

Fortnite Galactus Event Recap: Here's What Happened During The Live Event - GameSpot

New Transformers: Battlegrounds Trailer Shows Off Gameplay And Giant Robot T-Rex Grimlock - GameSpot

New Transformers: Battlegrounds Trailer Shows Off Gameplay And Giant Robot T-Rex Grimlock - GameSpot