Does sony have a franchise that will sell the PS4 out of the gate

[S.T.A.G.E.]

Sony doesn't need one title to make their launch successful, they need a fleet of them

Year 1 (First wave)

Killzone, InFamous, new IP

Year 2 (Second Wave)

Uncharted 4, Two more slots.

Sony can do it this way to ensure two years that are filled with first party.Third party exclusives will be made, so it doesn't matter.