Advertising for Super Mario Odyssey has started to spring up in Japan, showing off the scope of what we already know to be a very large game. One advert in particular, however, reveals something particularly interesting. A close look at the world map reveals what appears to be Isle Delfino from Super Mario Sunshine sitting not too far away from the Mushroom Kingdom.

Is this just an easter egg, or could it indicate that we'll be returning to the tropical island? We'll find out when Super Mario Odyssey launches for Switch on October 27th!