MK- The characters arrive on the train at Main St. Mickey and the selected family open the park with pixie dust while the trolley performers sing and dance.
DAK-The Adventure Begins show. Minnie, Goofy and Pluto check to make sure they have everything they need to begin their adventure at Animal Kingdom. Mickey shows up at the Tree of Life as their guide.
Epcot- Since the character bus no longer comes out, there’s a new opening ceremony. I’ve not yet seen it so I’m not entirely sure, but I believe Mickey, Minnie, Donald and Goofy show up in a Test Track car, and there’s a small ceremony where the selected family rides with them into the park and the family gets special privaleges all day long at Epcot.
Studios- The characters all meet at the entrance and rush towards the Hat where guest can begin their Hollywood Day.