After seeing how my son (when he was 4) enjoyed
LEGOLAND .. and a small "old timey" park in Wisconsin (that collects/refurbishes some old carnival rides and puts them into a small family theme park), I feel Disney is missing more "toddler" areas or attractions. I mean . .I get why they don't as those rides traditionally can't hold adults and aren't really crowd eaters.
While it has toddler rides (like Dumbo and Aladdin's Carpets) .. and they can go on Dark rides, there is just something about sitting on a vehicle and going in a circle that just amazes and thrills kids under 5.
To me, while looking forward to Toy Story Land, that seems what is missing from the area. A TODDLER ride .. or a playground .. or a splash pad .. or an air-conditioned TOY store that makes it a fun themed lands for the really little ones.