How Star Trek’s 2009 Time Journey Works
In theory, red matter is a substance that is supposed to create a black hole. In that regard, it does what it says it does. For example, only one drop should be able to “collapse a star or use up an entire planet”. So don’t put that stuff on your chili dogs, folks; because you are not the one who is being fed in this scenario. However, when Ambassador Spock tried to save Romulus from the sun collapsing into the supernova, the resulting black hole suppressed that particular catastrophe too late to achieve the desired effect. Which resulted in both Spock’s craft, the jellyfish, and Nero’s craft, the narada, being sucked into their vertebrae and appearing at two different times.
Star Trek’s time travel is inaccurate and shouldn’t even happen. It’s also an easy trip back in time as there is no way to measure exactly where or when you will land. So the future of Ambassador Spock will always lead him into the past and a brand new version of his events once he finally emerges from the black hole.