https://www.pcgamer.com/fortnites-next-item-is-a-grappling-hook/

Fortnite's High Stakes event rolls out this week, bringing with it a new limited-time mode, new challenges and a new outfit. It also appears Battle Royale's next item is a Grappling Hook, that lets players zip over buildings and rooftops. 

According to Fortnite Battle Royale News, it looks like this: