Well, the chances are really small that they leave the historical path completly in the grand campain. Its a ww2 game so it would be quite normal that we get that historical route. I hope for 2 paralel dlcs per year on the eastern front now. One histrocial and 1 ahistorical. So ppl could decide what they want to play. And Slitherine can monitor what route is more popular.
But im not sure if that is a realistic hope. Development costs,
And ppl wait for allied corps, soviet corps, africa corps aswell.
For my part, i dislike the "play your best game, but you will recieve a defeat at the end" picture. But i love panzercorps, so i will buys the dlcs (all of them...no matter what they release), but if they let me choose i would prefer a pure ahistorical dlc series in the future or paralel on top of the histroical dlc route. And i would enjoy this for any other xCorps aswell. Hell, i would even play a SovietCorps vs Aliens after germany is defeated ( )