Just going through and looking more closely at details.
I mentioned Disney Easter eggs above. Here's what I see as a full list:
Princess and the Frog - two frogs kissing in moat
Alladin - lamp and rug on the ground floor interior left hand side
Beauty and the Beast - Lumiere and rose-under=glass in the middle of the second floor interior
Cinderella - glass slipper in a secret compartment you get to by removing the dark blue roof/slopes just to the right of the Beauty and the Beast room
Fantasia / Sorceror's Apprentice - third floor interior just above the Beauty and the Beast room has buckets, mops, and the wizard hat
Sleeping Beauty - spinning wheel on the third floor interior just to the left of the Sorceror's Apprentice room.
Rapunzel - I'm guessing - brush and scissors in chest on the fourth floor just above the spinning wheel
Snow White - Magic Mirror and apple in the fifth floor just above the Rapunzel reference.
Brave - bow, target, cookies - you can see these in a detail shot but not in either the front or back view - since these are on a brown plate, they must be in between the central tank palace and the light bley outer walls.
There are some that I'm curious about:
Bedroom on the fourth floor - Is this a reference to a specific movie? Just a playable detail since castles need places to live? Or I read once that Walt had a private office or maybe apartment in the castle where he could look out and see the whole park. Hmm, if this is the reference, maybe Walt's frozen head is somewhere in a secret compartment?
okay, probably not
Kitchen. This is nicely done:
Kitchens certainly show up various places - e.g. Cinderella has to clean one (hmm, there is a pumpkin), a mad chef chases Sebastian around one singing about how fun it would be to kill and eat all of the major Little Mermaid characters, etc, Ratatouille maybe. I just don't see a direct connection. Again, maybe this is just a playable detail because castle residents have to eat.
Grandfather clock. I love the design on this and so hope the clock face is printed, not stickered.
Clock that strikes midnight for Cinderella? Cogsworth on growth hormones?
These awesome shields:
I tried to re-orient them in Gimp. Are those crests from something? It's not Prince Philip (my first guess until I looked up a picture). Maybe something from Sword in the Stone? They're really detailed and lovely (of course if stickered I'm less excited), so I love them regardless, but wondered if they were something specific.
Some other details, not Easter egg related:
Great design on this vase. Also note that they are using that tile first introduced in Nexo Knights as an ornamental detail in various places.
This chandelier (8 of those fez hats in white):
The detail work that went into the tops of these towers:
I love the repetition of the 1x2 bar with handles (classic space lasers) around those panels (hmm, didn't know about that piece - a doubling of the older corner panel piece). Also the layering of details in white on the other tower.
This spire might be my favorite bit. Very reminiscent of various cathedral MOCs.
These are in an upper window. Two of those shooters that show up in a lot of Star Wars sets. I'm guessing these are fireworks?
Now someone needs to light it all up Frozen style:
I don't know if they're still doing this, but we were at DisneyWorld last Christmas and at night they did that. It looked really awesome.