1967 Tomorrowland was wonderful, but I voted to demo everything but Space Mtn. Ideally, I'd love to see the return of the look, feel and optimism of 1967 and the same basic layout, with the Rocket Jets on a center tower above a central station for an update of the Peoplemover concept. Replace Autopia with something more exciting (and put an Autopia style ride in Cars Land replacing Rollicking Roadsters). Retheme the subs to the Underwater city theme. Udate of Flight to the Moon. Change out Star Tours and Buzz to something else.
The one thing from '67 that shouldn't return is the sponsorship-fueled idea that Corporations do no wrong and always hold the future of mankind in their best interests. Keep the optimism, but this time be optimistic that we all can find a brighter future together. WITHOUT being annoyingly PC or touchy-feely. And though Monsanto should probably sit this one out, we can still make miracles from molecules!