At this point he is in too deep. His only hope is that by continuing to deny any wrongdoing and continued efforts to delay things will work long enough that Donny can reclaim the white house and pardon him. If he recants now, he’s assuredly going to prison. That said - I suspect if he flipped and offered to testify against Trump, ‘ol Rudy might be able to secure a sweetheart deal. He’s far and away the closest person other than Trump himself who could best detail the extent of their criminal activities.