I've read the spoiler thread more or less from start to finish and I could count the more "kind of real" spoilers I wish I haven't read about on max two, three fingers. And those things doesn't give me any real clue at all for what is coming, really.
Concerning the songs; I guess they aren't considered as spoilers but as guessed or confirmed songs to be used in some way in the new Twin Peaks? Or should I edit this post?.
Anyway, do you think Lynch/Frost are going to have a new song in the beginning or/and the end of every episode of the new series? Do you think Lynch have ordered some favorite artists to contribute songs he could have especially as opening/end credits music, selected as he like? I doubt it a little, because of the too orderly/too basic feeling i get from that, but it would get every episode more of a movie feel and every intro/outro credits sequence some originality. And at least it isn't a too far-fetched guess on how the new intro sequence could turn out, considering I don't think they will do something similar to the original one from S1-2. But if I'm even close to something that could be, I think pop songs would fit better at the end of an episode, rather than at the start.
I think it's more possible though, they will be used as short, non-diegetic overlays ("music that does not occur as part of the action, and cannot be heard by the film's characters") like "Wicked game" in Wild at Heart (maybe I remember it wrong here though), "Ghost of love" in Inland Empire, "This magic moment" or "Song to the siren" in Lost Highway or "Blue velvet" in Blue Velvet.
But honestly, Lynch DOESN'T really prefer to use pop songs as non-diegetic overlays. Counting out Badalamenti's more ambient film scores, he more often than not places the music - the pop songs, at the CENTER of the scene - ultra-diegetic (my definition); "In heaven" in Eraserhead, "In dreams" in Blue Velvet, "Just you and I" and "Sycamore trees" in Twin Peaks, "Fifteen reasons" and "Llroando" in Mulholland Drive, etc etc. He loves to make those more lyric-heavy songs a central part of the room they are filling.
Do you think most of the more lyric-heavy music of the new Twin Peaks will be performed diegetically, on radio, a jukebox or by the artists on a stage (or something like that)? Or will Frost/Lynch mainly use them as non-diegetic overlays? Sorry for my long ramblings, but I tend to be thinking what I'm writing, when I'm writing it.