I was just having a little look on Mantic's website, specificity at the warpath pre-orders, and noticed they were listing vehicles! One for each of the two armies: for the Forge Father's there's the Jotunn Heavy Hailstorm Cannon and for the Marauders there's the 'Attackster', both are going to be in resin plastic. No pictures as yet but I'm sure they'll be online soon.
The Forge Father cannon will probably be artillery-ish but I'm pretty sure the Attackster will be a bike/buggy type vehicle. Either way its promising that they're doing more than just foot troops to start with.
I believe Mr. Mortis has some humble pie to be eating:
Mantic Newsletter wrote
The vehicle kits themselves are plastic resin and at least twice the size of the warmachines you’ll find in Kings of War: a Balefire Catapult on the sprue for instance weighs 20 grams whilst a Raptor weighs 60!