This has been done many times before but I don't give a fuck.
Features: Tech N9ne, Slaughterhouse, Possibly Dr. Dre. That's it.
Delivery/Flow/Voice: The Warning/Forever style
Subject Matter: A semi-conceptual album, similar to "The Cool" by Lupe Fiasco, where there is a theme/story that switches in and out as the album goes along, along with actual just-Eminem songs that spoke on whatever the fuck he feels like speaking on.
Skits: 3-4 skits, including intro/outro, all of which would be based on said "concept".
Lyrical style: Honestly, as long as he stopped the punchlines and went back to his old rhyme scheme I'd be perfectly happy.
Production:
7 Beats by Marshall himself
5 Beats from Dr. Dre
2 Beats from Mr. Porter
1-2 beats w/hooks from Corbett similar to the work he did for Saigon:
http://www.youtube.com/watch?v=pGzqaVCU ... re=related
http://www.youtube.com/watch?v=nsAoVXXL1dA
If the next Eminem album went exactly like this I'd call it a classic tbh.