Acrobat DC is included in the full subscription of Creative Cloud. However the new version is only visible in the update list of the CC applications if the system requirements are meet (min. MacOS X 10.9).
Creative Cloud members also get full access to Document Cloud (with additional 20 GB of storage).
According to Adobe it should also be possible to directly access files stored in the Creative Cloud from Acrobat DC. However in Europe this feature will only be available after the installation of the european Document Cloud server.
Please be aware that the Acrobat DC installer can de-install older Acrobat verison without any warning!