Assuming this is like The Big Picture where they will need guests to fill out the album, I would do this very strategically and logically:

MOP feature
OC & Jeru feature
Group Home feature
Big Shug and Freddie Foxx feature
Torae and Skyzoo feature
Nas and Jay-Z feature
Bun B and Scarface feature
Snoop and Kurupt feature
Jadakiss and Deck feature
Royce feature

Stick to the formula
Don’t try to bring in new MCs
Don’t make it too long