All right I have two good reasons to why law will most likely die.The first reason is not the best but since law is a doctor and he is as good or even better than chopper I think he might end up dying so chopper doesn't have any competition in reaching his goal.I also think the immortal surgery that was talked about in dressrosa will be used at one point,since oda made sure to include it in the story.Law will definitely use it at one point