Take this with a grain of salt...
During my last impromptu trip to WDW, I had the opportunity of taking the sunset safari at the AKL with the head supervisor of the savannahs at the AKL. He told my small safari group (six of us) that on May 5 (the kickoff of the DL Celebration festivities), Disney will be making a MAJOR announcement concerning new attractions at both DL and WDW. The WDW announcement, according to this supervisor, involves not only the Magic Kingdom, but also announcements of e-ticket attractions at AK, MGM and Epcot - some of which, in his words, will "knock your socks off."
Again, take it for what it's worth, but I will personally be interested in what happens and what's newsworthy out of Fort Disney on May 5...