Plenty of unlabeled concept art is featured in The Legend of Zelda: Tears of the Kingdom art book. The art focuses on The Legend of Zelda: Tears of the Kingdom’s locations, enemies, NPCs, weapons, and armour while avoiding all non-general spoilers. Most of this has previously been seen in Nintendo’s early previews, but there is also much that is brand new.
The finer details of what’s given in the art book will be a focus for ardent The Legend of Zelda fans who aren’t concerned about spoilers. While the art book itself may not contain any important discoveries, fans may use it as a puzzle book to hypothesise about greater aspects of The Legend of Zelda: Tears of the Kingdom. It’s not impossible for a fan to figure out the whole narrative of the game before it’s released.