User blog comment:Markra/the episode "Reading is fundemental" 2 more archangels wtf?/@comment-4011543-20120417202126

As far as I know the only possible Archangels there can be are Michael and Lucifer; as they are currently the only Archangels alive. Possibly they will both be freed and thus Castiel's battle to prevent the Apocalypse will have been for nothing. However, Crowley could pop back on the scene - He wanted Lucifer dead from the start.

Plus, those "hallucinations" of Lucifer that Sam was getting; I don't think they were hallucinations at all. Say what you want, but I think Lucifer really did escape the Cage with Sam and was biding his time inside Sam, so that the reason Sam was cold in Season 6 was that he was both soulless and also was possessed by Lucifer. I know Castiel said all the other angels would feel Lucifer's presence but Lucifer has a way of warping reality has he not?