This is what I was thinking, as well. Then to add on to Mike's quote
The ride will show Disney characters, in some instances, as toys that are made by the children of other lands, so it is in essence, how the children of the world use those stories in their play and lives - something that binds us all. What an appropriate theme - the innocence of childhood belief in stories of fantasy and fun.
As far as the Americana theming - don't the children of America deserve to be represented to all the tourists who come to
Disneyland from other nations? They have been left out of the "world party" (with the exception of the lone cowboy and Native American "indian" in the final scene) for all this time. Shouldn't we show the pride we have in our nation to others? In the 60's, the average American was not as globally conscious as they are today. Now, more than ever, the world stage is in the forefront. Why not show others how proud we are of our country - and it's history and stories, too?
PS - I always thought it was interestingly appropriate that the cowboy and indian were next to the French can-can girls. American Westerns were extremely popular in France at the turn of the century and wild west shows were always found there. Annie Oakley and several of the popular cowboys were known to tour Europe. That is also the reason for the Wild West stunt show/dinner show that was at Disneyland Paris when it opened.