Here you'll find the worlds you will visit in Kingdom Hearts II. Each of the worlds you visit will tie in to the story of KH2, not just the film they are based upon.
100 Acre Wood...
This was an optional world in the original, and plays much of the same role here. You get here by finding enough torn pages out of a wizard's book. This is the only world that is an exception to the rule where I said "every world ties in to the story of Kingdom Hearts 2", so therefore it is optional.
This world will feature many minigames in which Pooh will surely test your patience. Speaking of Pooh, he seems to be having trouble remembering who the group is...
Item id #19981
Agrabah...
In the first KH, Jafar was after Jasmine because she was Princess of Heart and he needed her to unlock the final keyhole, Sora, Donald, Goofy, and Aladdin fought Jafar and an unwilling Genie to save Jasmine. Afterwards, Sora locked the keyhole. This time, Pete has found Jafar's lamp that he was trapped in and set him free. More of Agrabah will be explored this time.
The world from the Little Mermaid. In the first game, Sora, Donald, and Goofy teamed up with Ariel to take back King Triton's Trident from Ursula, who had help from the Heartless. Now, this world will follow the storyline of the movie more closely. Ursula will offer to turn Ariel into a human so she can meet Prince Eric - which in turn will help Ursula's own plans. You do all this by playing in a musical mini-game.
Item id #19979
Beast's Castle...
While this was not a playable world in Kingdom Hearts, you met up with Beast and helped him save Belle in Hollow Bastion. Now, this is a playable world, and Beast, who attacks you on first sight, is being manipulated by Xaldin, who you encounter in this world.
Item id #19887
Disney Castle...
Disney Castle is the home to Mickey, Donald, Goofy, Minnie, and Daisy. It was shown in the original, but not as a playable world. The Heartless are invading the castle, and Donald and Goofy go off on their own so you are left to protect Minnie. The Altar of Light is located in this world which is the gateway to the Timeless River.
Item id #19966
Halloween Town...
The world of the movie "The Nightmare Before Christmas". In Kingdom Hearts, Sora helped Jack Skellington defeat Oogie Boogie, who had stolen an invention of Dr. Finkelstein's which had caused the Heartless to listen to him and cause many problems. This time, the world will follow the movie's storyline a little closer. The trio once again helps to defeat Oogie Boogie, this time because he has kidnapped Santa Claus.
Item id #19980
Hollow Bastion...
The world that Ansem was once king over and was home to Leon, Cloud, Yuffie, Aerith, Cid, and others. But, as we know, Ansem became obsessed with the Darkness after studying Heartless and began artificially multiplying them under the castle. The castle was deserted and reinhabited by Maleficent and Riku. Now, it is in ruins and being rebuilt by Leon, Cid, Cloud, Yuffie, Aerith, Merlin and others and Sora, Donald, and Goofy are asked to help. Later in the game, the Organization attacks this world and there are huge battles in addition to Cloud and Sephiroth facing off.
The Land of Dragons will, of course, follow the basic structure of the film Mulan. The plot was that the woman Mulan pretended to be a man to fight in a war against the Huns, led by Shan Yu, to avenge her father. She was accompanied by the dragon Mushu (voiced by Eddie Murphy, too). There will be changes to suit the plot of Kingdom Hearts, such as Shan Yu will be aided by the heartless to find the heart of the world which will help further his own goals and the presence of Organization XIII.
Item id #5532
Olympus Coliseum...
In Kingdom Hearts, Olympus Coliseum was where Sora, Donald, and Goofy fought in optional tournaments and a couple one-on-one matches (one against Sephiroth) for experience and prizes such as new keyblades. This is also where they encountered Hercules, Cloud, Phil, and Hades and fought Cerburus. In Kingdom Hearts 2, Hades is once again trying to get rid of Hercules by hiring Auron, who refuses. You also meet Demyx, #9 in the Organization, in this world.
This world will take a much more realistic looking turn than the rest of the Disney worlds. In this world, Barbossa (with the help of the Heartless) have kidnapped Elizabeth and you and Jack Sparrow fight together to get her back. The Organization member Luxord also makes an appearance here, and I'm hoping the guy with the parrot as well. ^^
Simba is king over Pride Rock, having beaten his Uncle Scar's plans for the throne. This time, Scar is scheming again - this time with the help of Pete. Sora, Donald, and Goofy, along with Simba, try and defeat him again.
Since there were no humans in the movie "The Lion King", the development team stayed true to that. Sora is a lion cub, Donald is a different sort of bird, and Goofy is a turtle.
Item id #19965
Space Paranoids...
Space Paranoids is the world of the movie Tron.
In this world, like in Timeless River, we go to the scenery of the original movie, so everything in this world is inside a computer and Sora, Donald, and Goofy have been changed accordingly. The trio will fight alongside Tron, the destroyer of evil programs, to defeat Commander Sark. There will be Light Cycle races involved - which should please any fans of the movie.
Item id #19779
The World That Never Was...
This is the world shown in the amazing first two trailers for this game, Deep Dive and Another Side, Another Story. I probably shouldn't mention to much about this world for risk of spoiling the game.
Item id #19784
Timeless River...
Timeless River is, if you didn't know, the world from the cartoon "Steamboat Willie" which was the first Disney short. It is the other side of Disney Castle and is accessed by the Altar of Light at the Castle - it is also where light was supposedly discovered. This world features black and white as well as signifigantly simplified characters and surroundings, giving it the coolest world ever award in my opinion. And of course, where would the Timeless River be without Pete? Pete was Mickey Mouse's original nemesis and is featured, as well as Mickey, in this world.
Item id #19640
Twilight Town...
Twilight Town is a very large place, with the Residential and Shopping districts that are connected by the train. here you will be able to play as Roxas as well as Sora, and we will meet up with Pence, Olette, and Hayner, as well as numerous others such as Kairi. Roxas is able to ride around on a skateboard to cover more ground in the large town. This will be one of the most important places in the game, and the Organization's mansion is there. Axel is the only member of the Organization confirmed to make an appearance, but there'll probably be more.
There is a tournament that takes place here known as "The Struggle" that you have to take on other people in fights. Roxas, Pence, Olette, and Hayner take part in this and it should be an interesting minigame. Seifer, Raijin, and Fujin (from FFVIII) take part as well as Setzer (FFVI) and Vivi (FFIX).
