So, not bad. The only referenced work I'm really familiar with (having seen it once) is Avatar, but things stood up well enough. The Diving Bell story was OK - the end, with the "Turn off the Dark" injury joke, was a pretty clever way to wrap it up, but may become a bit dated (at least in this case South Park beat them to air, with its 10/26 episode). I was feeling neutral about Dial D but I think I like it more after additional thought; I had actually wondered why Harry wasn't voicing God and why it seemed like a weird Dan voice, not realizing where the story was going to go, so I felt smart when the reveal came. I also enjoy the twist/Maude cameo. Na'vi, at 8 minutes, was clearly supposed to be the epic of the year, and I guess it got in some good jabs (the conundrum of having everything on the planet being "alive" was fun), but it didn't wow me. It was fun to see Kang and Kodos - sort of! - on their own turf without their bubble shields at least. (The end wrapup was kind of silly, like an anti-Marge-warning.)
I actually thought of almost no previous episode references/ similarities of significance. The opening's Hitchcock-style music I feel like I heard in LABF14 or something too, and the Spider-man movie kiss was parodied in FABF15 but this one felt like a parody of a different moment (I haven't actually seen the movies so I don't know). When I was writing this up, I also thought of Bart's pregnancy scare in JABF04, but... eh.
DYN: ...the full episode title was used in commercials (including the XXII)? (They've been using the TOH name in ads for a little while now, about as long as the on-screen titles have, but the number seems less common. At least the title was right - my online guide calls it Treehouse of Horrors XXII.) ...what seems to be a very quick anal bead joke in the first story? ...God has 5 fingers again? ...Bart in a Rigellian body appears to give an uncensored (middle) finger?
Goof There seems to be an unnecessary space in the third story's title ("Na'vi" is one word - it's not "Na' vi").
Meta -Cletus and Brandine seem to be offering several suggestions for where their own state (the one with Springfield) is. -Hilarium: it's a joke name but it's also in the same vein (HA, this is funnier if you read on) as the obviousness of "unobtanium"; it also seems like a slight metaphor for trying to mine comedy gold (and I note the substance is golden in color) especially in a long-running series like this; and as it turns out, it was essentially free (as, when it's on TV and not in a theater, this show is too).