Watching the official trailer, I get the feeling that not even Lucasfilm is convinced that a third dimension is going to improve The Phantom Menace. So they've instead they've opted for Plan B in the trailer for the 3D re-release: the eradication of Jar Jar Binks.
Gizmodo · Andrew Liszewski
NASA Is Developing 3D-Printed Chain Mail to Protect Ships and Astronauts
io9 · Andrew Liszewski