What's the significance of the Disney movie intro ident?

According to the Logos wiki,

In 2006, Walt Disney Pictures started using a new intro with a new CGI animation with a very complex depiction of the Sleepy Beauty Castle and its surroundings. It was a clear change from the old blue and white intro with its stylized castle and 2D animation.

The new intro was first used on Pirates of the Caribbean: Dead Man's Chest, which premiered in the United States on July 7, 2006.

Starting with The Muppets, "WALT" and "PICTURES" have been removed from the logo.

2006 is the year that Disney repurchased Pixar, and the year after Robert Iger took over Disney. There is a Pixar Disney introduction but, oddly, this new intro was not created by Disney studios, but by Weta Digital in New Zealand.

More information comes from closinglogos.com:

On a night sky background, we see a star, a la Pinocchio. Then, some clouds appear, a la Mary Poppins, and a pirate ship, a la Peter Pan. We then see the castle, done in CGI, while different fireworks are appearing. A circular line is drawn over the castle (in the same vein as the previous logo), then the castle enters many dots from the bottom of the screen to reveal "Walt Disney", in the post-1979 Disney script logo font, albeit slightly revised. "PICTURES" fades in, while the circular line is nearly staying visible on the logo.

The train could reference Dumbo, but I have not found confirmation of this.

(about 12 minutes into the film)

This is conjecture on my part, but I believe these are idealizations of other attractions at the various Disney theme parks. (Trying to find a source to back me up.)

The train is the Disneyland Railroad and the ship is the Sailing Ship Columbia

The scene before the castle reflects the Lewiston, Idaho/Clarkston, Washington area (separated by the Snake river). Steamboats were once used on this river. This is where Walt's wife Lillian is from and where they were married!

If you view an image of the Lewiston/Clarkston valley, you'll see the basis of this image at the confluence of the Snake & Clearwater rivers.

How about the hidden pics in the castle? Winnie the pooh peeking out of the castle spire on the right and donald duck is formed in the reflection in the center of the castle and then there is pluto on the left formed by two arches and a black spot for his nose. Thats all i have seen so far you do have to use your imagination a bit, but i think thats what walt would've wanted.

I don't necessarily think this is THE answer, but it reminds me a lot of the scene in Peter Pan where they fly over London. The coloring of everything, especially. I always just thought it was a clip like that of some bridge that crosses the Thames.

Thames Train

Here's the exact picture I feel it shows, but that's just me.

Peter Pan Scene

Coloring

Call me crazy, but I've always thought that the steam train in the background was the Polar Express, and the ship in the river is from Peter Pan. And of course, the good old castle.