It had been announced as special last year. Due to versions and reprints, some reference materials assume there were 2 Enterprise really ringships - Starliner-7/XCV-330 and Declaration class.
The CGI model is Mark Rademaker's and appeared in one of the 2010s and the 2013 Ships of the Line calendars.
The novels explain the design as based on Vulcan ship design, realised by Human engineers.
Ship articles:
http://memory-beta.wikia.com/wiki/USS_Enterprise_(XCV-330)?useskin=oasis
http://memory-beta.wikia.com/wiki/USS_Enterprise_(Declaration_class)
The CGI model is Mark Rademaker's and appeared in one of the 2010s and the 2013 Ships of the Line calendars.
The novels explain the design as based on Vulcan ship design, realised by Human engineers.
Ship articles:
http://memory-beta.wikia.com/wiki/USS_Enterprise_(XCV-330)?useskin=oasis
http://memory-beta.wikia.com/wiki/USS_Enterprise_(Declaration_class)