It's something new for this movie is my guess.
Yeah, that was my thought as well.
My guess is NX-Class starship. Further, after all the speculation, I'm going to go out on a limb and suggest it's Captain Garth's original ship that had been kept in mothballs since is imprisonment.
Either that or it's some other class of ship, since the villain is "detonating" the entire fleet.
I think that ship was a lot larger than the NX-01 was wasn't it? It seems larger to me....I liked all the new ships from the 2009 movie, so I'm totally cool with something new for this one.
I do wonder if we'll have a scene where he causes several starships to fall to Earth, wreaking devastation. It'd be crazy awesome if so, IMO.