Theming: Transportation
This could be especially appropriate for preschoolers who just want to ride the monorail, the train, etc.
*On a new monorail circuit* (We are dreaming, right?

) This resort is so special that it has monorail access to all four parks plus DTD.
A huge lobby with glass elevators.
A train that makes a figure-8 pattern through the resort.
On a lake so water mice and boat rides are options.
Horse-drawn carriages would add to the atmosphere.
Special fireworks just for the resort.
Think we could fly if we had a little trust, faith, and pixie dust?
Two/Three distinct rooms - one/two for kids, one for adults - with a living area and small kitchenette. It wouldn't have to be much bigger than deluxe rooms are now to still be afforadable. Oh, yeah, we're dreaming, price is not a problem!

Add porches with rocking chairs and I'm good to go. The rooms could be kind of a cross between WL rooms/WL lobby and Holiday Inn Family Suites.
A "studio M" type of place at the resort - one picture free per night's stay.

Additional purchases optional, of course. At least a private place to spend a few minutes with Mickey and Minnie.
Different pool areas. One hot tub/quiet pool oriented; one smaller kid/family oriented with zero entry; one big kid oriented with something similar to Storm-a-long Bay, but with a slide entrance INSIDE the pool area and waterfall.
A large resort shopping area.