All the work is done is AE, no pre-rendered 3D material.
The text breaks apart and re-forms using standard effects.
Maintains the 3D effect even during the transform.
This file should provide you with the techniques required to create 3D text transformations in After Effects.
The work has been done in the most simplified way possible, some basic key framing modifications will be required when changing the text.
With some experimenting, you can customize the file to your needs.
Audio not included however can be found at the following links:
Music – Symphony of Spectors: http://audiojungle.net/item/epic-cinematic-trailer-music/129524
Sound Effect – UnlimMedia