Sieh an, noch ein Kaimer-Fan ;)
There's little hope (in fact: I never have hope here) for a German avatar. In fact, I believe that the company has frozen this part of the game.
To them, it apparently comes down to big revenue for all development. CC passes and the Clashes, ball gifting, clubs and balls becoming more expensive with each introduction... There's only one time business with an avatar, this isn't enough IMHO.
And, all other countries with bigger participation here have their avatar(s), USA, Canada, UK (though split in countries), Australia. People from smaller countries (Spain, France) have asked in vain for a long time...
Have fun with the available items!