(let alone with Vulcan and T'Khut -- such a 3-planet system would be unstable).
T'Khut itself does have a moon in ST:TMP.
And that would be an unstable and physically untenable situation. Indeed, the image seen in TMP is impossible if taken literally. SF loves to show humongous planets in the sky of alien worlds to make them look more alien, but they tend to exaggerate absurdly. In order to be that huge in Vulcan's sky, "T'Khut" would have to be the size of a gas giant (impossible for a rocky body, for it would collapse into a more compact degeerate-matter state) and/or close enough to Vulcan to be on the verge of collision. (Although one could take it as a bit of visual trickery, shooting with an extreme zoom lens from a considerable distance, so that the size of the moon/companion planet as compared to the person/object on the surface is greatly exaggerated, as
here.)
And even if T'Khut could stably have a moon, it wouldn't be glaciated. Vulcan's a hot desert world, T'Khut a volcanic hell. If the moon were smaller than both those bodies, there's no way it would be frozen over, because smaller bodies change temperature faster than larger ones. (A frozen chicken breast thaws a lot faster than a whole frozen turkey.) There's no way a small moon could stay frozen in that orbit.
The Nero comic implied that Delta Vega is a planet in the 40 Eri system with an eccentric orbit, and that at the time of STXI Delta Vega was (conveniently) at it’s closest to Vulcan, whereas it usually spends it’s time much further out. Thus “fixing” every “problem” with it.
Hmm. It's an interesting idea, but it would still have to get extremely close for Vulcan to literally appear as large to naked-eye viewing as it seemed in the mind-meld scenes.
It appeared to subtend a similar angle to the Earth's moon, about half a degree. (And the zoom-lens-from-a-distance technique wouldn't work, since the angle is from directly below and behind Spock, and he wasn't standing in front of a deep crevasse.) Earth's moon is about 3500 km in diameter. Vulcan would be a larger planet than Earth; if we accept Memory Beta's value of 1.4
g for its gravity and assume a density similar to Earth's, we get a diameter of at least 17,000 km, nearly five times Luna's. So Delta Vega would have to have been less than 2 million km from Vulcan at the time. Such a close passage would have gravitational and tidal effects on both worlds, perhaps not enough to have dangerous geological effects, but enough to influence their respective orbits over the long haul.
Maybe I could buy it if it were an extremely rare fluke, if they normally passed farther apart but just happened to be making an extremely close approach this time. But the level of coincidence required would be staggering, orders of magnitude greater than the coincidence of Kirk running into Spock Prime's cave. Also, such a planet being inhabited seems unlikely, but then, that's pretty much true in any case.
Okay, I'll admit, this is one scenario that might be possible, albeit unlikely. But it's still a lot simpler to assume that what we saw in the mind meld was merely symbolic.
It’s if the books bore me to death with 10-page essays on why Spock “felt” rather than “saw” Vulcan die and “Why Delta Vega Is All Wrong” that will annoy me.
It doesn't need a 10-page essay. I could probably explain it in a single sentence. Something like, "Ambassador Spock suppressed a shudder as he recalled that terrible moment on the surface of Delta Vega, when he had felt the telepathic agonies of his people's demise so vividly, so viscerally, that it was as though he had been physically present to witness it firsthand." (Though personally I think that what we saw was Kirk's mind interpreting Spock's telepathic perceptions in more visual terms since the human mind couldn't directly process a psionic sensation.)
Besides, didn’t the “holy shit it’s an ice bear” thing start with a TNG novel in the 90’s? Prime-verse TrekLit had monster-riddled ice worlds over a decade ago.
Yeah, but those ice worlds weren't alleged to be orbital companions with sweltering desert worlds. I could write a story about an explorer encountering a polar bear on a glacier and you'd be okay with it, but what if I claimed that the glacier was in the middle of the Sahara? I think you'd have a much bigger problem believing the story then.