Vanguard

There have been some recent speculation as to what the vanguard is ad their activity in Destiny. Many think it is a class. Others think it may be a title or position a guardian can earn as they achieve a higher level (like a prestige) bungie is yet to release any information on the Vanguard (or for that [quote][/quote]matter, anything else) after the E3 reveal. What do you guys think? I the vanguard good or bad? Will they be playable in the game? Are they just a myth? You decide, write your comments below.