With that said, rumors about Mustang's "next chapter" have flooded the news board. Some rumors say that it'll be just customization kits for both V6 and GT models. Others suggest it'll be the Shelby GT500 Mustang. A third possibility is an all-new variant of the Mustang, most likely a concept that would later come to a production version. However, Mark Field's wording seems to hint at something all new and a new motor. So some speculate that it's most likely to be a Boss Mustang with a 400hp 5.0L V8 and a manual gearbox, to compete with its deadliest rivals. So yes, the 5.0L V8 rumor is back! We just have to wait until January to find out.
Source: [Speed TV]