This should not be a forgone conclusion. We WDW fans SHOULD expect a 5th gate very soon. If you look at it from a master planning/business model POV then we are overdue for a new park at WDW. Let's look at the numbers.
Magic Kingdom - October 1971
EPCOT Center - October 1982 (11 years)
Disney MGM Studios - May 1989 (6.5 years)
Disney's Animal Kingdom - April 1998 (9 years)
Present Wait for 5th Gate - October 2009 (11 years +)
We have been waiting for a new gate longer than at any time in the history of WDW. Is it too late to get a new park ready for the "Two Score" celebration but if they start building/clearing land and put a preview center up for the Droves of people that will be going to WDW for the 40th Anniversary I am positive they will comeback to enjoy the park they saw "Coming Soon".
Now if we could just find some Corporate Sponsorship...Wait a min...The Walt Disney Co. is the worlds largest media conglomerate, Just build the thing already. I don't care what the Design Theme is, I will love it, and I will spend tons of money there...Pinky Promise!