If he ends up as good a producer as dre is, he probably won't be back. He'll probably show up in some rap songs for nobodies though to help make them famous, which will work because people know he won't be coming out with any new stuff and he's got a huge fanbase who want to hear any stuff he's in.

I think there's a strong possibility he's just retiring from rapping because he can make even more money, easier. Who knows though, I'm not in his brain.

If his producing flops ((which it hasn't so far)) than expect him to be back 'in da game' as soon as his cash flow get's low.