Re: Nero is dumb (spoilerific)
But the "old" timeline still has their temporal cops. Come to think of it, this would put the temporal cops of one timeline trying to save Vulcan at odds with their counterparts in the other timeline trying to preserve that timeline by letting Vulcan die. Another Temporal Cold War, anyone?
Where the hell is Captain Braxton, or Crewman Daniels, they have temporal sensors, maybe at least one of them would have noticed the planet Vulcan, and most of their Vulcan colleagues dropped off the sensors?
Different timeline... are you sure that the temporal police will even be created in this one... besides... now this is their history and they will refuse to change it...
But the "old" timeline still has their temporal cops. Come to think of it, this would put the temporal cops of one timeline trying to save Vulcan at odds with their counterparts in the other timeline trying to preserve that timeline by letting Vulcan die. Another Temporal Cold War, anyone?