I made an account just to respond to this..........
1. Those designs on the banners in the picture are NOT the keyblade and Sora's crown symbol.
2. No, Walt Disney did NOT come up with the Keyblade. I have no idea where you came up with that. References please.
3. Disney does not own Kingdom Hearts. Square Enix does. So unless they come to some agreement, don't expect to see a lot of Kingdom Hearts themed things in the parks. The most of what you'll see are some keychains, and sometimes you'll see the most current Kingdom Hearts game in a store somewhere. They used to have a Sora figure and the game on display in Walt Disney World's "One Man's Dream" exhibit in Hollywood Studios, but it's not there anymore.
Lately, they've released a limited edition Kingdom Hearts Pin, which sold out almost instantly. It was a unique design specifically created for the park's Pin Trading. After that, they released a new pin of Mickey in his Organization XIII cloak. I came across it a few months ago completely by accident, and bought it immediately when I did ha... a photo of it is attached.
So, yeah. We can only dream. I mean, they've been releasing these pins..and slowly introducing Kingdom Hearts merchandise into the parks. So who knows what's going on behind the scenes.
While I'm at it, I thought everyone would like to see this post I found last week. Be aware, it was an APRIL FOOLS JOKE back in 2010, so don't get your hopes up...AT ALL.
here it is:
http://www.mouseplanet.com/9170/Kingdom_Hearts_and_Steampunk_coming_to_Magic_Kingdom