SU is always dropping objects and hints that we have to watch out for. Heck, there are things that have taken more than 50 episodes to explain. There are some things over 100 episodes old that we're still puzzling about (that huge sword from Bubble Buddies that made a return in Ocean Gem). So will we ever learn about that weird orb on the moon? I mean, we've been there twice and still had no explanation. What could it have been used for? And why did it still appear active?