Well, I think its clear that we're going to see a not completely redesigned but an updated Enterprise. From what I could tell from the teaser trailer it's probably going to be a bit curvier. We already know its not using the same font for the name on the ship.
Actually, what we know is that they used the font used in the Franz Joseph stuff on the hull.
Which MIGHT have been done for a reason... other than "we want to make random changes."