The original audience has grown and is more mature than before. What was originally a crossover experiment has become its own franchise and should develop deeper, darker themes. No more happy go lucky Sora. He needs to grow as a character and stop acting like a child. A veteran, wiser Sora would be a much more interesting character to play as. It would also attract a lot of new fans. With Call Of Duty, a very mature game, raking in more sales each year, kids are going crazy to prove their manliness. What better way to do this than to have a, as stated before, veteran Sora with battle experienced, older Donald and Goofy helping you out? Darker colors would be required, more gore and blood, some swearing, and an actual weapon (it's called a keyblade). It would also help Disney's "kiddy" image. If the formula proves to be unsuccessful, they can revert to the original style for the next saga. They wouldn't even have to spend a whole saga with this style. It could be a test game. It'd look similar to FF Versus XIII, but would still contain Disney characters (darker versions, of course). Imagine this scenario: A character is walking down a battered, broken hallway in Disney Castle, covered with a brown cloak. Heartless come out, and not the wimpy kind. I'm talking Defenders, Wyverns, Neoshadows, Wizards, etc. The character takes off his cloak and its Sora, obviously older (around 21), with some facial stubble, a battle scar or two, a stern expression on his face (think similar to Kratos, just not as angry). He summons his new keyblade, a modified version of Kingdom Key that actually looks like a blade and starts fighting the Heartless. Of course, these graphics are all with the engine of Versus, giving it a sort of realistic touch to it. If Sora receives damage, it will be shown visibly. The same goes for magic: Fire would singe his clothes, while Blizzard would leave ice particles, etc. Donald and Goofy come out and help when Sora is having difficulty and they are also serious and brooding. They would have their same voices but they would obviously be adjusted. Their clothes would look more modern, nothing wacky looking. This is just Sora, Donald, and Goofy though. Riku would obviously go through some changes, having a style similar to Noctis. I think it would provide a refreshing change of pace to an otherwise stale series. If the fans don't like it, then they can always revert. Not to mention, this darker style would draw in a lot of fans from the "Call Of Duty" crowd.