New spoilers from Sera Gamble's interview for the upcoming issue of Supernatural Magazine.
Just got the latest copy of Supernatural Magazine. Interviews with Jared and Jensen, Jim Beaver, Cindy Sampson, and Jake Abel. None of them are particularly spoilery for season six and appear to have been done a while back (the Cindy Sampson interview is very nice, but I was kinda surprised at how many different questions I asked her).
There are some spoilers in Sera Gamble's interview, though, both past and present:
She finally admits that, in HotH, she fully intended for the "angel" to be real, because she likes angels and think they're "badass", but Kripke absolutely refused, fearing that introduced angels would be "airy-fairy and fluffy". She talks about all the fortuitous "foreshadowing", with the "shoutout to Michael" and such.
She also talks about Dean's "happy accident halo" at the end of Bloodlust, in answer to a question of whether Dean was always intended to be Michael's vessel.
Speaking of Michael and Lucifer, they're stuck together, fighting, forever, and she doesn't seem interested in bringing either of them back, ever. She also says that it's not necessary to bring Lucifer back because there is already so much bad mojo down there that the demon-creation system is self-replicating. She says that Crowley's powers weren't cut off because he gets them from all of the damned souls who've made crossroad deals. She says that that this season will be "less demon-centric" (aside from Crowley, of course).
She says that they don't have plans to "hook up Sam" with anyone specific this coming season, but "have more plans in that regard with Dean".
She talks a bit about bringing the Trickster back, but doesn't seem very optimistic about it. She also says there are a lot of stories that didn't fit into the Apocalypse uberplot that the writers would like to try now, but doesn't say which ones.