at 5:45-6:00 in the video "And maybe one day become powerful enough to find a way inside the vault of glass, to defeat the most challenging experience we've ever created, and earn Destiny's ultimate rewards." During the beta i noticed i received an item(s) called shard of glass by doing strike missions. do you think this will be used as a key of some sort to enter the vault of glass? and if so what do you think lies beyond the final doors? *edit also i noticed 6 players attempting to make it through the vault of glass in the above video. so possibly a 6 person freeroam mode/mission mode? instead of the 3 person mode?