I think the slogan ought to stick with "The Happiest Place On Earth" but if we must change it out for the Year of a Million Dreams, I think I like "Where Dreams Come True" better.
The whole idea behind the slogan is that you go to Disneyland to live out your greatest childhood dream - from riding on Dumbo, to becoming a Princess, or training to be a Jedi, or to being a Pirate....
You don't go to Disneyland to create dreams. You go there to live them.
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The problem with a slogan is that it is a slogan. One has to believe what it says or it will be scoffed at by the public. "The Happiest Place On Earth" worked so well because nearly everybody has a "happy" time at Disneyland. It is hard not to be happy there. It is a believable slogan.
Now "Where dreams come true" and "Where dreams are born" both have the problem of being over the top. It is a false claim. "Dreams" for some children come true at Disneyland, but for most, people have much bigger dreams. If your dream is a churro or riding a streetcar pulled by a horse, then yes your dreams can come true. But if your dreams are to become a doctor or win a medal at the Olympics, no, Disneyland will not fulfill your dreams.
You see Disney marketing got it all wrong. Disneyland does not fulfill your dreams, but it IS the dream come true. It was Walt's dream that there would be a place that would bring happiness to young and old. He got HIS dream fulfilled.
Jiminy Cricket Fan