Yes, because Prigozhin would be so incredibly stupid as to not have foreseen that possibility and taken out some insurance because of that.
He was also stupid enough to get in a private plane and fly over territory that has Russian SAMs. With the crap going on in Moscow from those drones, and the absolute inability for Russian air defense to de-conflict an airspace, pretty much nobody should feel safe in a plane in the air in Russia.
But it is not so unbelievable that he never betrayed Putin and his expectations were irrelevant, because he was following a path with no forks or alternatives.