Already read the new No Quarter? There is some clear evidence that the Farrow will get artillery and how it will look like. By the look and the description in the Gavin Kyle Files it will probably be some sort of Bazooka. Regarding the look I like that they stick to the theme of square-shaped barrels.
I’m not sure how this will fit in the Farrow army. On first glance it seems like a non mobile version of the Gun Boar’s gun. Maybe we will get some nice special ability with it to give it a special role on the battlefield.