You forgot the most important color 'Orange'.
Will the DLC allow you to chase Mo Green out to the Tropigala in Vegas, or are you pursuing his childhood friend, Meyer Lanksy, to the Nacionale in Cuba in preparation for Operation Mongoose?
How will you build that Secret Regime around Rocco Lampone?
Will Al Neri leave the police force and become your Luca Brasi?
Leading to the BIG question - at which point will Empire of Sin allow us to take a boat to dump a body and let it Sleep with the Fishes?
(BTW, Charlie Luciano's colors were yellow and black. I don't think he'd appreciate being downgraded to the Tattaglia family's sigil bearer.)