That artist is one of my favorites there. It's an excellent work for the Excelsior idea in the Kelvin universe, and I imagine something like that would be the initial design until Marcus wanted it bigger in the face of the Narada and threat of Klingon war.There's an artist on DeviantArt who had the same theory, and redesigned the Vengeance with a more typical Starfleet colour scheme and slightly more Excelsior-y lines.