[evil_genius_180]

Yeah, I figured that "concept that was never made" was going to be the explanation, I just thought I'd ask. As for the Constitution-class with the nacelles turned 90 degrees, you can easily just say that's a class variant. But, as many people have whined about since it was revealed, there's nothing like the JJverse Enterprise anywhere in Starfleet in the "prime" universe. (AKA, the real Trek universe)