Rare have done plenty of third-party crossovers with Sea of Thieves such as Gears of War, Halo, State of Decay, etc.
What third-party thing would you like to see Rare do for Sea of Thieves? It could be anything from books, films, games, anime, anything.
For me, I personally would love to see a Tomb Raider, Goonies, Indiana Jones or One Piece crossover.