Studio Ghibli Announces a GHIBLI PARK for 2020 - Make Your Travel Plans Now
There is already a one structure on the Expo grounds that is on theme. A recreation of Satsuki and Mei's house from My Neighbor Totoro was built as an attraction for the 2005 World EXPO and has remained and been maintained since.
With the love and popularity the film has, much deservedly, I think its a safe bet this will be the tourist attraction that the parties involved hope it will be. The goal is to have this theme park ready by the year 2020.
Aramajapan.com: Studio Ghibli Park set to open in Aichi Prefecture by 2020
Inquirer.net: 'Ghibli Park' opens in Aichi Expo Park early 2020