Omegaman I am sorry but you are wrong, (or what I consider wrong) I examine both images as well. The skylines are different because A. different angle shot, one shot we are looking at the enterprise from its right site the other from the left side, B. Different times of the day = different lighting and colors in the sky. The dead giveaways are the white cylindrical structures. When you look at the picture with Kirk looking at the ship the white structures are clearly in front of him (with the federation flag.) In the image from the teaser photo those same white cylindrical structures are just down a bit and to the right of the welder. Sorry but it is unmistakable.
Take another look
Although I like your speculation, and I would love it to be true, the timeline was restored and at the end of the movie we see the construction of the old constitution well all know.