At the time of this market's creation, in the southwest corner of the Kharidian Desert on the OSRS world map—south of Menaphos—there's a large black square of void and nothingness.

 black squares like that in the Kharidian Desert, but one of them got filled in with the Uzer Oasis and Ancient Vault in early 2023.

So. Will the other square be filled in as well, some time before the end of 2025? If yes—operationalized as "there are no black-squares-of-the-relevant-sort in parts of the world map touching the Kharidian Desert", such that if it's partially filled in or moved but still present in some capacity this won't be market-resolving—the market will resolve No; otherwise, it'll resolve Yes.