On my recent trip to Disneyland, I happened to notice how awkward and weird the section between Tomorrowland and Fantasyland is. It's a Small World isn't much of a fantasy (besides the Disney characters), and Matterhorn is based off a real mountain, so besides the Yeti, there really isn't much fantasy. While it doesn't bother me, I know many have complained also about the Submarine Voyage not belonging in Tomorrowland.
So, why not turn that back corner of the park into "Worldland"?
It's a Small World takes you on a voyage around the world, Matterhorn transports you to Sweden, and Finding Nemo's Submarine Voyage has you exploring the Great Barrier Reef in Australia.
Since Autopia cuts into "Worldland", why not turn it into a Worldland attraction? You could drive by scale models of famous cities (San Francisco, Paris, Tokyo); the new Autopia would be similar to Storybook Land Canals, with cars replacing the boats, and city models taking the place of storybook models.