I think it's inevitable that he takes the Germany job at some point, probably when he's a bit older though, he seems to really dig the day to day things he wouldn't get at an International job. I expect him to leave when his contract is up (although I didn't think he'd sign his recent one so what do I know) spend a year travelling around with his wife and then evaluate things.
I think after the world cup the noise about him and the Germany job will become deafening though, we'll all panic, he'll just ignore it all, same as it ever was.