Hey all, just posting this here in hopes of Bungie seeing it and because this area looked way too awesome to just show a select few people, enjoy!
Also an album with picture of a second room I found as well. http://imgur.com/a/EH1sG
-
The area you said that there might be a boss looks very similar to the area in the Moon trailer where a hive ogre boss was chain up here and attacked the guardians. Looks just like it.