After filling in the 20K Lagoon Pooh's Playful Spot was built on a very small area of the land that once was the 20K Lagoon. There is enough land behind Pooh's Playful Spot to hold a dark ride, An E-Ticket ride & still have room for Pooh's Playful Spot,I feel the Pooh area was built not just to entertain the little ones but with a hidden agenda.
What agenda you ask?
Why to hold the area for future attractions!
What attractions you ask?
Blue Sky has some rumors out about new attractions for Fantasyland in WDW.
The rumors include a Little Mermaid Ride, A Seven Dwarfs coaster, A Beauty and Best Dark Ride,
and a "Pixie Hallow" meet & Greet for Tink.
From what I heard from some pretty good sources the Little Mermaid is very probable.
I think the Seven Dwarfs coaster makes sense because of the timing of the predicted ride opening about 2011-2012 also coincides with the 75th anniversary of Snow White. The Disney studios had a big 50th celebration for Snow White and I think a new Snow White ride for the 75th anniversary would be a big draw.
And of course Pixie Hallow would be a great addition.