https://www.pcgamer.com/fortnite-teases-quad-launcher-as-next-weapon/

The best weapons in Fortnite are determined by circumstance, strategy and tactics. Me? I like blowing things up, wherever and whenever—which is why I'm digging the battle royale's next incoming firearm. As teased via the game's message of the day screen, Fortnite is getting a Quad Launcher. 

Alongside the description "quickly fire up to 4 rockets to blanket an area with explosive damage", the Quad Launcher looks like this: