I know this topic is old, but I want to throw this out there. I don't think we can completely judge what the ship will look like. You have to remember this. This is a teaser. It is designed to catch our attention. The shot with the Enterprise's saucer and nacelles...well, look at it this way. For one thing, the nacelles are too close together. Why? Because they're not attached. However, as they are now, when you see it for all of 10 seconds, you know exactly what ship it is. Secondly, the registry. Too close to the front of the saucer rim you say? Yes, and no. I highly doubt Starfleet would actually emblazon the ship's name on the saucer if it was still being constructed. However, with the name cleverly front and center in the teaser, yet again, it lets us fans know exactly what ship it is. As for it "snapping" you have to see that the ship is, as I said, in pieces. When the shot is panning up towards the dorsal side of the saucer, you can see that there is nothing under the ship other than scaffolding holding it up. And even if said connections were in place, those sections that would "snap" are very big, comparatively.