One on one with Joe Rhode, the man behind Pandora: The World of Avatar

You don't need to be an "Avatar" fan to fall in love with Pandora.

It's a big day for the creative force behind Disney's newest addition, Pandora: The World of Avatar.As the lead on the expansion, Joe Rhode, a longtime Disney Imagineer, told ABC News that seeing the "extraordinarily challenging" project come to life is "extremely gratifying."Visitors, he said, are "speechless, which is exactly what you want."The official opening is Saturday, but media were invited to Pandora for a look at the finished product of a journey that began with the 2009 hit movie "...