Lems lied saying this was just an expensive update to make the game 70 dollars for the ps5 version. Nope its a whole new island to explore and play. It's basically a modestly priced expansion.
So just buy the ps4 version on sale if you can get it for 30 or less and update for 30 dollar than you don't have to pay 70 for this you can buy it for $60. Which is the same price as a horrible xbox game without extra content like an island.