M, I, C, K, E, Y: Indeed, it's billed as "the largest Disney fan event in the world," meaning that people arrive from all over (with mouse ears planted firmly atop their head). Many of them will have nabbed those tickets early, and with good reason: They're discounted for a "limited time." An adult early bid one-day admission is $61 from Aug. 14 through Dec. 31, and D23 members get 'em for a little bit less. As for what's at the expo? Just about everything under the (Disney) sun: movie previews, star appearances, games, and merch choices aplenty. There has to be a lot: Some 65,000 fans showed up for the 2013 D23 Expo. Consider the Disney bases covered on this one.