They shouldn't have to start over, they're not owned by Sony, Sony just published the Helldivers games for them and likely owns the IP.
They would just have to walk away from the best selling franchise they've ever had, which is difficult. They seem to have scruples, but they're also humans who probably want to live comfortably and feel secure in their futures like the rest of us. If I'm being honest, if it were me, I'd probably take the money because life's hard enough as it is.