I didn't think so.
Turns out that Action Pack 6 is here! A Decade of War. Ten scenarios, new Australian Balancing System, and three of the new "innovative" 11"x16" mapboards that are meant to cap off regular geomorphic mapboards.
Here are the juicy contents. Note that mapboards are numbered 1a/b, 2a/b and 3a/b (they are backprinted!).
Here's mapboard 3a for your viewing pleasure.
Looks neatorama.