Kingdom Heats 4 is set to take the series to the brand-new world of Quadratum, located on a separate plane of existence from the rest of the Disney-themed realms in the franchise. The Kingdom Hearts series has a history of introducing new gameplay mechanics to fit within the worlds of each game, and with the unprecedented implications the world of Quadratum has for Kingdom Hearts 4, it's a perfect time to revisit one of the series' most controversial gameplay elements. While Kingdom Hearts 3D: Dream Drop Distance's Dream Eaters had their flaws, a similar mechanic could fit right into the upcoming entry.