Ever since it was revealed, I've been seeing a number of people complaining about the fact that Sora's KHIV outfit isn't in keeping with his usual fashion style due to things like a lack of zippers, buckles and large shoes. So I thought I'd explain the likely reason behind this for those who want to know. Firstly, aside from his original KH1 outfit, all of Sora's previous outfits have been made using magic. Both his main KH2 outfit and KH3 outfit were made by the three good fairies and the world-exclusive outfits, such as his Halloween Town look, were created by Donald's magic. His Dream Drop Distance outfit was also either made or altered by Xehanort's magic to hide a tracking sigil on him. So what about his KHIV outfit? Although in the KH3 secret ending we see Sora seemingly arriving in Quadratum still wearing his KH3 outfit, in the first KHIV trailer we see him waking up in an apartment room in Quadratum wearing his new KHIV outfit before opening the door to Strelitzia. So it's possible that Strelitzia dressed him in those new clothes whilst he was asleep (or got one of her friends such as Sigurd to do it). I, however, think it's more likely that his clothes automatically changed when he arrived in Quadratum (despite the KH3 secret ending) due to the unique nature of that world - not as a result of a person's magic but as a result of the world itself. One of my reasons for thinking this is that Sora's necklace has completely changed, even between the first KHIV trailer and the ones shown this year. Yes it's still a crown pendant, but it's smaller and on a much finer chain. That's the one accessory of his that's stayed the same throughout his main outfits in each game until now. Therefore I believe that the simplicity of his new outfit is intentional. Basically his necklace, as well as the rest of his outfit in Quadratum, are just a more realistic version of his KH3 outfit. And by 'realistic' I don't just mean in terms of the graphics, but rather it's an outfit that wouldn't stand out too much if you saw someone wearing it down the street in the real world. And that's how it's meant to look, because Sora is meant to be in a place that looks like our world. That's why Quadratum looks exactly like the real-world Shibuya. Further evidence of my theory is in Riku's appearance in the latest trailer. We don't get a very good look at his outfit, but he's definitely wearing a different outfit to the one he was wearing when he left The Final World to travel to Quadratum. Likewise all the other characters we've seen in Quadratum so far are wearing different outfits to the ones they had before, with the exception of those wearing Organization coats. Now regarding the Coco world, we've seen that Sora's outfit in this world is still the same as in Quadratum; he's just wearing skeleton make-up with it. This may appear to contradict the above theory, however it's possible that Sora is still somehow linked to Quadratum whilst visiting the Coco world, kind of like how Riku retains his Dream Eater outfit when he leaves Sora's dreams in Dream Drop Distance. We see that Donald and Goofy both get completely new outfits when they arrive in that world, thanks to Donald's magic, so we know that Nomura hasn't abandoned the inclusion of Disney world-specific outfits. Knowing Nomura, I believe that there is a reason behind all of these details and that we will eventually see Sora back in a more Sora-esque outfit again soon.