Paramount has provided artwork for the complete
Enterprise series; all four seasons, in one set coming on
November 1. The 27 disc set will contain 76 hours of material, and 22 featurettes. There isn't anything extra if you buy the complete series, and the packaging appears to be a cardboard wrapper around the 4 sets.
Amazon.com is selling the 4 seasons for $335.99.
Here's the artwork:
