All depends on the contract he signed.
If he signed a bad contract..........and the contract is legally binding...........there's nothing he can do.
Has the ownership of Death Row even been resolved yet?
Last I heard, there was an ownership dispute with Suge and somebody who claimed they helped him start Death Row.
So, who would he even go to in order to get the pay he deserves.............assuming he has legal grounds to dispute the contact?
And would they even have the money to pay him?
Best he could probably do is get them to give him his masters or something.