As a game goes along, older sculpts can seem to not quite fit in with current designs. New sculptors or art directors come in and things might not look as good as they once did. That's where resculpts come in. Megalith Games is working through some of their older figures and updating them. This time around, it's the Scorpio artillery piece for the Mortans.
From the announcement:
Who doesn't love mowing down the enemy on the other side of the table and instilling fear in your opponent as he marches his warband ever closer to towards a battery of war-machines?Source
This nice piece of hardware is just the thing for Roman...ahem... Mortan players, now with revised crew sculpts.