But could he? The point of change is when the Narada arrives in the 23rd Century. He cant stop that because it "starts" in a different universe. He would have to travel to that universe and he can't do that. His other choice would be divert the Kelvin so it doesn't meet the Narada. But that could also change things. Or assemble a fleet to meet the Narada, again that could also change things.
Actually I was referring to the single point that an altered timeline couldn't explain away for me... Nimoy's Spock would've at least searched for a way to correct the whole timeline the movie was based in/on. He's done it before (or was he just flat out jealous of Edith Keeler? *grin*). (wouldn't it be funny if they already filmed a Spock's timeline restoration and stored it way for when this version runs it's course? LOL)
He's Spock. He can come back from the dead. He can calculate time travel and cold engine starts. He's been known to actually kidnap people against their wishes, when he thought it was good for them. It's sci-fi. He can do ANYTHING. He could go back and actually avoid pissing off the biker Romulan. Or he could go back and make sure biker-Romulan's mommie doesn't drink so much Romulan ale and alter biker-Romulan's brain chemistry so he isn't so apt to anger over losing everything near and dear to him. He could suddenly have a half-brother who shares biker Romulan's pain. He could go to a pub and throw darts backwards in anticipation of a reversal of polarity of chroniton particles from interacting with a tachyon pulse caused by quantum flux torpedoes in Romulan biker gang asteroid mining companies actually owned by Ferrengi. The original Kirk and Spock can do ANYTHING. (they're bona-fide proven intergalactic larger-than-life heroes, you know! *grin*). OR he could influence an alternate reality and force an actor to hold out for a script written by an actual science fiction author. To quote Spock... "There are always possibilities."
"Fascinating**"
** - Bonus irrelevant quote at no extra charge to you the readers!