Mr. Porter wrote:He wants him in his next album? Like you open the case and he jumps out at you?

I'd definitely buy that album.
Reminded me of Eminem's Pieces of Advice For the Kids (Letterman show):
"If I sign something for you, and I see it on Ebay, when you go home, I'm gonna be under your bed."
Did anyone try that

?
To stay on topic: a lot of artists want Eminem on their next album.
Il Divo want him on their album, for heaven's sake. And while I enjoy listening to Il Divo, I can't see nor do I want to see that collab... Although, if there's an original approach on that, it could be very interesting.