Per blu-ray.com:

the inclusion of Dolby TrueHD 7.1 surround on this instead of DTS HD MA is no surprise.

Why's that?

I'll be picking this up since so far every Pixar 3D title has been flawless.

Pixar and DTS sound used to go hand in hand, though with these reissues/3D releases (and 'Brave'), the trend has been to go with Dolby - there's nothing wrong with this but it's odd that Disney is deciding to go the Dolby route on these discs.

Maybe they got more favorable licensing terms from Dolby and are switching over?

Just $, I'm sure.

Dolby and DTS do not recieve any licensing fees from studios for DVD/BD. Revenue comes from hardware but they also sell the encoding software to the studios for Dolby TrueHD and DTS-HD MA but that's a one time cost. No per encode/movie fee/royalty. Worked at DTS for 4 years and others have stated the same.

The encoding software is not only a one-time cost, it's a very minimal expense. Hardly the sort of thing a studio would flinch at.

Dolby has made a very aggressive push to get back in studios' good graces by improving its authoring software to make it much more user friendly (it used to suck compared to DTS) and offer new features such as 96k upsampling.

Have you had any experience with those? I doubt they'd sound as good as anything natively recorded at 96 kHz but I'm still curious if there is any genuinely audible benefits from upsampling 48 kHz material to 96 kHz.

Wish there were an easy way for me to upgrade to 3D for Pixar releases. I bought them as they came out, but now they're all being re-done.

Still haven't watched my original DVD all the way through ever since it crashed at the layer change on my Pioneer DVL-909! I've since gotten players that will probably handle it better.

Ah, layer changes. I forgot about those.

I was really hoping these Pixar releases were encoded as such ...

Dolby demoed it for me in their lab. My write-up on that is here:

http://www.highdefdigest.com/blog/dolby-96k-upsampling/

Long story short, I'm not sold on the need for it. Atmos was vastly more impressive, but that's not ready for home use yet.

Thanks, Josh Z. I'll be reading that article right now.

EDIT: Good article. And it seems you experienced about what I expected. Interesting stuff nonetheless.

I'd never even opened my other blu ray copy, luckily I got a nice chunk of change for it by reselling it on amazon in anticipation of this release

Can't wait, the Blu-ray that was released a few years ago is hard to come by

^It's only hard to come by because they stopped making it in anticipation of this release. Pixar films never go "in the vault"

Now if only they'd re-release The Incredibles. mainly because I hope it creates renewed interest in a sequel.

Yup, I sold my Blu-ray a few months ago for about $25, and the bonus DVD and digital copy a few years ago for about $4 each. That should pretty much cover the cost of upgrading to this 3D edition.