Well I have found on a Disney fan forum a detailed discription of the attraction, with what it will be etc.
The Queue line will be covered, but will not be themed as a coralreef like previously planned, instead it will resemble the Sydney harbor as in the movie, with poles in wood, fishing nets on the ceeling and lanters will light up the area.
The loading zone will have the same theming with either walls in brick or wood.
A hut in bamboo will be placed next to the loading station with 2 seagulls on it.
Once the trains have left the station, they turn left and go up the first lift and immediately going outside the building, as can seen on the plans. Right before the lift, we'll see the shadows of the 3 sharks.
The lift will be themed as a coralreef, and will feature 2 characters from the movie: the blowfish and Jacques, the French lobster who cleaned the fishtank in Finding Nemo.
In the darkride part, a brand new projection technique by Imagineering will be used, which can project the characters very close to the riders, which will give the impression that they move in a real 3D set.
The technique is a videoprojection on a transparent screen, a bit like the post show of It's a Small WOrld with the little characters in the different houses. Everyone who has seen a demonstration off this new technique was impressed.
Two animatronics will also be part of this section: 2 fish set up in 90?, so that both will be visible for the riders facing backwards. They still have some problems tuning the double show, so that all riders have a good view on the different scenes.
Next is the Coaster part, an underwater effect will be used which is similar to the starfield in Mission 2, but it's not limited to just some bubble projections, because there will also be the jellyfish attack which will be physical effects (jellyfish on a wire...). 3 Underwater tunnels with a dry wet effect (similar to the Squid attack scene in the Nautilus) will also be added to the track, soap bubbles (as in Animagique) are also considered as an extra addition.
Projections will also be used in the coaster section, Crush and his friends invite us to join them in the East-Australian current and sea-beds will be used to give dept to the sets...
Source:
http://www.photosmagiques.com/forum/vie ... =4603#4603