Ripley is right - more non-German subjects would be good. I think Rubicon has done a great job giving equal coverage to non-German subjects - especially US and Soviet vehicles. So it would be good to see something Italian, or maybe French. It's riskier territory though - I have no idea what the market is for an M13/40 or a Somua S35.
I too agree that non-German subjects would be good. As a modeller of British subjects, more British vehicles would be nice - currently for post D-Day Europe there is only an indigenous AA vehicle. But on further reflection (and slipping into the "what have the Romans done for us" sketch) there is also a light tank, a tank destroyer (with indigenous gun) and an armoured car with jeeps and lorries to come. Which is probably actually better than the Soviets.
No idea what the market would be for French or Italian equipment, the latter might get a boost from the Bolt Action North African supplement. Opportunity for an Italian versus British release (I do not have the Axis supplement so cannot suggest suitable opposing vehicles, possibly a light tank or an A13)?
Trucks make sense, but when it comes to spending my "pocket money" the inner child goes for the shiny tank, at least this one does... But if it was an AEC Matador or Steve Palfry's Scammel ...