The magical energies exerted by Pan cause the Anthropomorphic Shift.
The characters' zig-zagging between Civilized Animals and Funny Animals is rather confusing, especially for first-time readers. One could say that Grahame was writing these stories to amuse his small son and prioritized the entertainment value of a bedtime story over plot and world-building consistency, and one would be right. However, it's also possible that Pan is somewhat interventionist and has blessed his devotees with the power to be whatever size their situation requires. This would also explain why most humans would fall for an amphibian's washerwoman disguise.The Wind in the Willows is the far distant future of the Redwall series.
By some unknown circumstance, Redwall Abbey is no more and humans have appeared on the scene. Toads have evolved from primitive tribal savages to wealthy aristocrats, the infamous mole dialect has faded out of existence, and the dichotomy between "woodlanders" (moles, mice, badgers, otters, squirrels, etc) and "vermin" (rats, weasels, stoats, ferrets, foxes, toads, etc) has almost completely broken down (with some lingering prejudice remaining towards foxes, stoats, weasels and ferrets). Rabbits are still idiots, though. The Wild Wood is actually Mossflower where many animals still live according to the old savage ways. Mr. Badger is, in fact, the last surviving descendant of the badger lords of Salamandastron.- Well, the "infamous mole dialect" need not disappear, because it's a phonetic rendering of a West Country accent, and Willows apparently takes place (vaguely) around Berkshire. So Mole's theoretical cousin from Somerset probably does still sound like that. Who knows, maybe Redwall Abbey disappeared in the Dissolution of the Monasteries.
Disney will make a live-action/CGI adaptation.
Disney originally wanted to make a full-length feature of it until WWII forced it to be part of a package film that became The Adventures of Ichabod and Mr. Toad. So they could try it again, this time as a live-action/CGI movie that Disney's been making a lot of lately. It'll be an Adaptation Amalgamation of the original book and the Disney animated version. It may be more faithful to the book, but one element from the Disney version that'll very likely remain is Mr. Toad being innocent of the crime he was accused of, and the rest of the movie will be of Mr. Toad on the run until he clears his name.