I'm sorry, but did you discuss their misapplication of the many worlds therory in your post? If you did I'm missing it. You spoke of supernovea and black holes in the next part of your pos,t not the Many Worlds Theory.
It's actually not so much that they
misapplied the Many Worlds Interpretation (it's not a theory; it's never been tested), but that they repeatedly beat the drum for it as the latest, greatest, and best scientific understanding of quantum mechanics, and thus the only responsible way to present time travel.
Now, I'm actually quite fond of the MWI, and I've read quite a few good SF tales that use it as a jumping-off point. But it's not new (it's been around for 50+ years), and it's not authoritative (it's still completely hypothetical, and likely to remain so). Moreover, time travel of any sort remains completely fictional (more's the pity), so there are no verifiable rules on how it "should" operate. The most important thing within any given fictional setting is just to take an approach that's internally consistent.
In Trek, it's always been clear that there are both parallel universes (as seen in the various Mirror Universe episodes, and also "Parallels," the TNG ep that O&K like to cite)
and time travel within a single timeline, which can be changed and changed back ("Tomorrow is Yesterday," "City on the Edge of Forever," "Yesterday's Enterprise," and too many more to count). What O&K did here was mix the two concepts together, and insist that time travel created a whole new timeline.
(Personally, I don't quite buy it. There are clues to the contrary suggesting that Nero and Old!Spock came from an alternate 24th century to
begin with, not the one we're familiar with: for instance, the completely different way stardates are formatted, including the 24th-century date mentioned by Old!Spock's ship. Not that we're likely ever to see this settled in "canon" one way or the other, of course.)
I don't think it was Romulas' home star but one near by.
If it was "near by," then we're still talking about several light-years at a minimum... plenty of time to get out of the way, unless (once again) the wavefront was somehow moving at superluminal velocity.
Plotwise, this whole backstory might've made more sense if, say, the "supernova" was not a natural phenomenon but the effect of some superweapon or other (thus explaining its otherwise impossible characteristics), triggered by, oh, it could be anyone, so long as Nero had reason to
believe it was Spock and/or the Federation. That would've also made the motivation for his, umm, extreme hostility at least a bit more plausible: a (perceived) deliberate attack is a lot more provocative than "you didn't act fast enough to save me from a natural disaster!"
Yes I'm aware of that. Thats why I mentioned a black hole is a componant of a wormhole. The Red Matter is fictional so it can do what ever is needed. Including creating a wormhole instead of a traditional black hole as Spock assumed it would.
Saying a fictional device can do "whatever is needed" is very sloppy writing. O&K didn't give us so much as one sentence of exposition about what "red matter" is supposed to be or do, though, so they obviously didn't much care. Regardless, one thing it
shouldn't do is behave in
contradictory ways depending on the needs of the plot — on some occasions creating a black hole with a singularity that sucks things in (the supernova, Vulcan), and on others creating a passage that sends things through time (the Narada, Old!Spock's "Jellyfish" ship).
In the real universe no, but in Star Trek (where a nebula becomes a solar system in the blink of an eye because of "proto-matter) I dont see why not.
"Why not" is because it's just stupid: not merely wrong but
obviously wrong, an insult to the intelligence of viewers and thus something that breaks suspension of disbelief. Also because it's lazy, as it's really not that difficult to come up with something more plausible.
(By way of contrast, the concept of instant terraforming is admittedly a bit of a stretch, but at least
ST II took the time to set up "protomatter" and its properties properly, and then used it accordingly within the story.)
Granted, this isn't the first time a Trek story has forgotten that the speed of light exists. The climax of
ST VII, wherein Soran's missile detonates a star and the effect is immediately visible on a planet several light-minutes away, is another painful example. But that's the sort of thing self-respecting writers should try to
avoid, not to
emulate.
Star Trek movies have rarely, if ever been "decent SF films".
Well, I disagree. I think several have been, and the track record for the show(s) is pretty good as well. And if it's not a standard every story can live up to, they should at least
try. This one didn't.
Moreover, you're now taking a tack I've seen from a lot of other defenders of NuTrek: rather than defending the movie on its own merits, you're making negative generalizations about past Trek in order to argue that this was
no worse. That's debatable (I think it is worse), but either way, it's a very different argument from saying the movie was actually good.
Thing is Science Advisors can say "that doesn't make sense" all they want. It doesn't mean the writers, director or SFX guys are gonna scrap an idea that works on a dramatic or visual level.
Well, obviously. But that just begs the question of
what "works on a dramatic or visual level"... and I submit that really glaringly obvious scientific impossibilities
don't. There are times they should listen to the advisor, and rewrite.
I read and watch a lot of SF. Talented writers know how to push the envelope of scientific theory without tearing it, to step up to the line without crossing it. Abrams and O&K seem to be unaware any line even exists.