I'm sorry, but I absolutely CAN'T agree with the previous comment. EDIT - Harmy is faster than me, so "previous" means "Wabid's" :-)
"I don't see a situation where a person would be able to play the mkv but not be able to work with the avchd. I do see situations where a person could play the avchd but not the mkv."
Nonsense. I know NOBODY who is not a member of this forum and knows what an AVCHD is, and all of them know how to play mkv files.
Sorry, but mkv is the standard for "releasing" HD "unofficial" movies, it has many advantages and no disadvantages.
Also I can't agree with a TRILOGY BLU-RAY, I think it's a very stupid idea. The ONLY reason why "I" (and I think most of the fans of Harmy's work) want a BD release it to have all the audio and subtitle tracks, nice menus, and nice bonus features. There is no chance you would make ONE disc and have it all contained there