This is interesting, I did a google search for TRZ on disney's site. Here's what I got:
http://www.google.com/search?hl=en&lr=&as_qdr=all&q=trz+site%3Adisney.go.com&btnG=Search
Apparently, TRZ is an airline code that has something to do with the city of Tiruchirapally in India. O_o
The only google result for TR2N on disney's site is still that interview with some pin ambassador guy..
Found two results when I searched "TRON 2" (quotes meaning exact phrase) on disney's site. First result concerned TRON 2.0, second one was a transcript from the Merrill Lynch Media Fall Preview Conference which took place on September 9th this year. I posted the TR2N segment somewhere here earlier. I think it's interesting that they refer to it as "Tron 2"...
If they are intent on calling it TRZ, then perhaps we can confirm it will take place in India or something..
Sounds like a product code key for Tarzan products, actually. Wait, Tarzan takes place in India or something...
EDIT: I just looked up TRZ on the acronym dictionary or whatever it's called, and the only thing TRZ stands for is that airport in India. Why are they naming this movie after an airport code?