Well, I haven’t encoded the MKV yet. It won’t be too big to fit on a BD25 with the DTS-HD tracks, though. It’s just a matter of how many of the bonus tracks are allowed to fit on.
What happened the first time was I tried to get all 22 or whatever tracks to fit. It fit just about perfectly, with 16mb to spare. Then, I re-encoded due to something I had to fix, and it went over a bit. So, for my V1 release you need to exclude two of the 160mb ac3 tracks for your least favorite language. Which is fine. No one should need every language in a copy for their own personal viewing.