With Amazon's main market being America I would expect the Volvo to be a Volvo VNL, which is a long nose truck sold in America. The Volvo Globetrotter that we get here is a cab over engine design, but it's non-existent in America. I'm thinking he will be a remould of a movie Optimus because of that.
But whichever Volvo he is based on I'll be buying him as I often drive a Volvo in both American Truck Sim and Euro Truck Sim 2.