^ lol - good points. The larger MKV may have slightly higher bitrate for video, but we will end up getting a 'proper' blu ray disc release eventually anyway, so everyone should be happy! We should be happy that we're getting a good release soon, with an even BETTER (full blu ray) one in the near future!
I'm also a fan of the AVCHD format due to the simplicity of making a disc that is easily playable. Besides, yes, the 'container' matters very little - would be funny if Harmy did end up throwing those extra files to convert into the package.. for AVCHD, I'd still prefer an ISO or just the files/folders that would fit on disc as they currently are - extras might make it confusing to burn as AVCHD (especially if it's larger than what'll fit on disc). Either way, should be good times for all, and we'll eventually have a very, very, very nice non-SE set, which is ultimately the coolest thing ever.