https://www.pcgamer.com/thanos-seems-set-to-return-to-fortnite-just-in-time-for-avengers-endgame/

Fortnite’s Thanos limited time mode from last year seems to be making a comeback, coinciding with the debut of Avengers: Endgame later this month. The mode drops the all-powerful Infinity Gauntlet onto the map, and the player who picks it up becomes the surly purple bad guy of Marvel fame.

Epic hasn’t officially announced the return of the mode yet, but dataminers have apparently found some pretty clear clues in the latest patch. New kill feed messages discovered by Skin-Tracker include the string “Yielded to the POWER of Thanos,” as well as a couple references to ice fiends and unleashing an "inferno" of some kind.