If it wasnt for Dre, Eminem wouldve been another underground white rapper like Cage, Necro or Ill Bill. Never to blow mainstream. MM probably dont need him now, but he rescued dude out the gutter, i mean trailer park. 50 caught fire and gained big buzz after MM and Dre picked him up. He already had How To Rob, which was doing okay, but it was Aftermath Shady that blew him up. He also got that Westcoast co-sign which put a lot of us out here with him looking to fill that 2pac void.
With that said, if he focuses on Kendrick Lamar like he did with MM, they West may have a new star to emerge. He will be much better for the West than lets say a bi-polar Game.
In regard to Cube, yeah it sucks that him and Dre couldnt get that track out or full album out. I just think it would be a good look for Cube. Something tells me they dont really trust each other tho.............