The Beatles are a timeless band and I feel like they would be an amazing addition to Fortnite as they have so much potential and certain songs such as "Helter Skelter", "Here comes the sun" and "Help" would be brilliant additions to the game along with their Sargent Peppers Lonely Hearts Club Band skins. Their instruments would be great emotes as well as pickaxes such as Paul Mcartney's bass guitar. 

Even though some will argue the Beatles are not popular enough to be added into Fortnite, I feel like anything is possible and I reckon they will become very popular skins and will be a hit if the right songs and skins are chosen for the game especially in a Music Pass.