Ok, so me and my friends just followed this tutorial on YouTube, and we were able to see and kill one of the new bosses available in the upcoming DLC House of Wolves. Following this tutorial on the Earth Cosmodrome will let you see the boss, right now named "Ultra Captain". He is not very difficult and I'd expect that he's just a storyline boss, nothing to due with the new raid. I hope you guys can learn from this and continue to see how Bungie locks us out of content that is already on disk in order to increase profits.