If this game is getting ANY dub, it would be more economically viable to get a Spanish, French, or Chinese dub long before a German dub.
Hmm, I think it's a decision about how much money another language version would generate in revenue. The pure distribution of a language only helps to a limited extent. Purchasing power and demand is probably the more important reason.
And there is a reason why there are so many (good) dubbings in german language...
