It's a decent movie tie-in that answers some unresolved hooks satisfactorily. Nevertheless, I can't help but feel that it doesn't stand on its own that well. There are also a plethora of minor nitpicks of assorted severity. It's a bit short, and possibly could have stood to be even shorter? Not sure. Interesting, at least, and it is good to see some of the TNG cast getting to do some things (even if some of the cameos were a bit forced- see below on Worf, especially).
**SPOILERS AHOY**
OVERALL PLOT NOTES:
I'm not sure I liked how they did Nero's story arc. Admittedly he DOES have a reason to be pissed off at the Vulcan high council, but not really Spock. It should be very obvious to Nero that Spock was trying to help and save Romulus.
Also. I suppose this is the point, but the Vulcan high council's decision was fantastically stupid. They don't want to let the red matter fall into the hands of the enemy? Fine, only send enough to stop the supernova, and send a big Federation escort along with the ship. And if the Romulans don't like it then they can let their planet be destroyed. The worry about the Romulans stealing it seems silly, and may not matter if the supernova really does "threaten the galaxy."
So, yeah, if Nero had gone to try and wipe out the Romulan high council in the past AND the Vulcan one, I'd have bought that from what the comic book setup. His grudge against Spock is weird.
NITPICKS:
* So what was the Enterprise doing conveniently hanging out in Romulan space anyway to meet Nero? (Because the plot required it had to be there. Right.)
* Yes, supernovas are well-known, so a good choice for a cataclysmic threat, but we want them to be different than real supernovas for dramatic purposes... fine. Still, some of the wonkiness is just silly here. Super flares of energy to warn people that turn planets into pure energy to power up the supernova for later? What? And aren't the Romulans supposed to be on par with the Vulcans for crazy technology? Shouldn't they have been able to confirm a well-known threat like a supernova, and not disbelieve it, especially one so blatant as this? Also I feel compelled to point out that if Alpha Centauri went nova, but we had faster-than-light starships to notice this, we'd have 4.3 YEARS to plan our evacuation from Earth. So, the impression I got from the movie was that this happened on a much shorter time scale - Romulus's star was looking "normal," but suspicious, Spock notices, the Romulan Imperial Senate disagrees, etc. At least then, there'd be an excuse both for the Romulans disbelieving warnings and for why Spock wasn't in time - once their star goes supernova, Romulus blows up only 10 minutes later or whatever. The impression I get from the comic book is that the Hobus star system is totally different; the closest rationalization I can give is that it's a binary star system with Romulus nearby, I guess, but meh.
* Also. The star is gaining mass and becoming more unstable? Nitpick, but supernovas occur when a star has LOST too much mass. Eating planets with superflares to give it more energy would presumably increase its stability and delay the time of destruction, actually (assuming such a gain of mass made sense, which it doesn't).
* Vulcans thought Spock was a traitor for going to Romulus? As an *ambassador*? That's what ambassadors *do.* I can't think of any examples of this happening in real life, at least when it's an official ambassador and not some unofficial peace visit a la Jane Fonda. Hell, it's often the most loyal servants who would be sent to the homeland of your bitterest enemies. Not logical.
* And Worf is a general of the Klingon Empire? Sure, the Klingons are allied with the Federation now and all, but I'd assume that his loyalties would still be to the Federation first.
* I can grudgingly accept Nero's ship wiping out fleets of 100-year-old starships with far inferior technology, despite his rig being a mining ship. But wiping out hordes of Klignon ships in the "present day?" WTF? I'm sure the convenient Romulan weapons dump was helpful, but the fact remains that this was a MINING SHIP. Retrofitting an oil tanker to be a warship is inherently going to result in something worse than a warship built as a warship. I guess they wanted to include Worf in the story somehow, but it felt like a lame way to do so.