Re: Teaser a Slight to Kirk?
Or it could be that Nimoy's voice has gravitas and is instantly recognisable, and Pine's is not.
Exactly. The purpose of the trailer is to build interest in the film. A recognizable voice long associated with the property delivering the line has much more impact than a voice most people won't recognize.
"I mean, it's an amazing quality some people have to be able to ignore every piece of evidence and fact and still have their opinion." - Stan Van Gundy