Deadpool Weekly Challenge 1 can be found by accessing the computer in the secret toilet room that's accessible, after buying the Season 2 Battle Pass, from the Fortnite Season 2 secret lair's by going into the air conditioning vent in the background. Access the computer, then "ESC" back out of the computer to view the room again. To find Deadpool's Letter to Epic Games, select the letter on the ground below the toilet.