him dying doing the reichstag fire (working late in his offices? of cause this demands you subscribing to the belief that it wasn't a nazi plot)
It would be very funny if someone forgot to tell him. I just can't help but imagine the following conversation, as flames engulf Reichstag.
- Hermann, why is the light in Fuehrer's office still on?
-I don't know Heinrich... Wasn't Joseph supposed to tell him?
- But he has fallen ill and I thought you did...
- Well I didn't, you can't expect me to do everything by myself. Oh, well it is probably too late now... Look, the flames have already reached the second floor. Well, I am off. To Sweden... C' ya.
But seriously, Hitler dying does not mean an automatic end to
Nazi Germany, at least in 1939, and perhaps 1940. However, as SS grows stronger, likelyhood of civil war grows too. By 1943 I'd expect to see disloyal Heer pitted against loyalist Heer and SS, while in 1944 it would probably be SS taking overall command of all loyalist forces.
Goering became Hitler designated successor in 1939 so if anything did happen, the Reich would not fall to pieces immediately. I'd expect a period of peace until the positions were reshuffled. Then, depending on force of arguments of each side, varying loyalties and probably luck to some extent, someone would emerge victorious.