Here are some quick thoughts of mine: The celebration should last about 5 years. It should include a mass amount of rides being added to every single park. Like about 20 rides in total. It should end with the grand opening of a new park on the 55th. I will post more during the course of this thread about what I would suggest.
http://www.themeparkinsider.com/news/response.cfm?ID=945506063
Magic Kingdom-
1)Add AAs to Peter Pan's Flight
2)Add Fire Mountain to Adventureland,
3)Realize the plans for Western River Expedition
4)Add dark rides to Fantasyland based on Tangled, Pinocchio, Princes and the Frog, and Sleeping Beauty, and other upcoming Disney movies.
5)Bring back Mr. Toad's Wild Ride, using AAs
6)Tron lightcyle ride
Epcot-
1)Replace Circle of Life with Walle show
2)Add a ride based on weather
3)Bring back a Health pavilion
4)Add more rides into World Showcase
5)Add a ride based on Magnetism
6)Revamp the Imagination pavilion
DHS-
1)Completely change park by having it more clearly broken into studio lots; Include Muppet Studio, Marvel Studio (taking over Backlot), and Lucas Studio expanding them in the current areas. Add rides such as new Muppet vision and Indiana Jones adveture.
2)Complete Pixar Place adding rides based on Monsters Inc, Cars, and the Incredibles
3)Revamp Animation Courtyard by replacing TLM show with Animagic from Disney Studios in Paris and return Art of Animation to former glory. Add Roger Rabbit's Car Toon spin
4)Replace Beauty and the Beast with a show based on Tangled, Mary Poppins, or Enchanted.
Animal Kingdom-
1)Add Beastly Kingdom featuring a flock of new rides.
2)Demolish Chester and Hesters Dinorama, reinventing Dinoland USA.
I think Stitch may go from MK, being replaced by a totally new attraction, rather than just a refurb.
With the Fantasyland expansion I can't really see much else happening with the Magic Kingdom.
It would be nice if Epcot got at least two new countries, both boasting an attraction each. A new pavilion in Future World wouldn't go a miss, but I can't see it happening.
A new E-Ticket for both DHS and AK would be fantastic, particularly for the latter, where Everest, Kili and Dinosaur still face crowd issues due to a lack of major attractions in the park.
Perhaps make a new land at each park.
It would also be about time for Disney to set up something new and exciting. Its 10 years away!
I would like to highlight the point I made about DHS. The park would simply be renamed Disneywood. In this park, there would be emphasis on lands, rather than the disorganized mess I feel it is now.
The Great Movie ride will be updated to include more current scenes with a special emphasis on Fantasia. Gone is the Sorceror's Hat, and Grauman's Chinese Theater returns to be the park's icon.
Lucas Studios- This studio would overtake Drew Carey's Sounds Dangerous, transfering that advanced Jedi Training Academy into the facility. To avoid repetition with Dinosaur, the Indiana Jones attraction would be a similar coaster to the one found in DLP. The Epic Stunt Spectacular will remain, as well as Star Tours.
Marvel Studios- This studio would become a reality once Disney started negotiations with Universal. It would overtake most of the backlot tour and Lights Motors Action. Basically in this plan, Disney would gain the Marvel Cinematic Universe that Marvel is currently developing. That said, Universal would keep the rights to use Spiderman, X-Men, and Fantastic 4. However, Disney would gain Hulk and Captain America. This studio at Disneywood would feature rides on the Hulk, Captain America, Thor, and Iron Man. In a perfect world, Universal would just simply retheme their entire Marvel island, and Disney would also gain Spiderman, Xmen, and Fantastic 4.
Muppet Studio- This studio has been in talks for a while. It would finally bring the Great Muppet Movie Ride to the park, satirizing some of the greatest movies. Pizza Planet will be rethemed to Gonzo's Pandemonium Pizza Parlor. In the old Hunchback theater, I suggest to place Enchanted the Musical there. While it is not a perfect placement, it is better than that garish scenery they've placed.
Pixar Studio- This studio will finally get the treatment it deserves. The Honey I Shrunk the Audience playground entrance will be moved, and be rethemed to a Bugs Life. Radiator Springs Racers will make its debut towards the back section of this studio. That Monsters Inc Coaster will overtake one of the soundstages, while an Incredibles 4D ride will overtake the other.
Animation Studio- Animators will return the the Magic of Disney Animation to work, and a new show will be brought here. Journey into Narnia and One Man's Dream will close. The One Man's Dream exhibit will be moved to Main Street. Roger Rabbit's Car Toon Spin will be placed here. Animagic, from Walt Disney Studios, will overtake the Little Mermaid theater. Silly Symphony Swings will be built where the current Playhouse Disney theater is, opening up a new walkway to Sunset Boulevard.
Sunset Boulevard- not much changes happening here, except for the retiring of the Beauty and the Beast show. In its place will come Mary Poppins the Musical, a shortened Broadway version. That new walkway from Silly Symphony Swings to Rock n Roller Coaster will soon one day form the courtyard to what is to be Music Studio.
