So this should be the Reich succession in my opinion:
I. Göring and Goebbels successfully negotiate with the Wehrmacht.
I./1. Göring usurps everything a few month later.
I./2. Goebbels usurps everything.
II. Bormann calls the Senate, but bombs them and makes himself sole survivor.
III. The Senate is called and election begins.
III./1. Himmler is chosen successor.
III./2. Dönitz is successor.
III./3. Speer is successor.
III./4. Bormann is successor.
IV. Wehrmacht takes everything and issues martial law. He chooses a form:
IV./1. Military rule.
IV./1./a Rommel is chosen as Führer.
IV./1./b Guderian is chosen.
IV./1./c Manstein is chosen.
IV./1./d Rundstedt is chosen.
IV./1./e Paulus is chosen.
IV./2. Wehrmacht Head of State, but a partial democracy (in which only rightist parties can be voted)
IV./2./a
IV./3. Wehrmacht chooses to elect a king.
IV./3./a Hohenzollern dynasty with Louis Ferdinand as ruler
IV./3./b Successor to the Bavarian throne is chosen as ruler.(Albrecht, Duke of Bavaria)
IV./3./c Habsburg dynasty is chosen. (Otto becomes ruler.)
IV./3./d Different Hohenzollern branch. (Frederick, Prince of Hohenzollern (H-Sigmaringen branch)
V. In each scenario except III./1. Himmler can try to grab leadership and Gothenland can prepare
for a civil war. If Gothenland is isolationist, than Heydrich can grab leadership from Himmler, or
if Himmler is the Führer, than he can try to grab Führership. Each other Führer will have an event
about dealing with Gothenland later. First choice should be leaving them alone. The second would be
trying to take the leaders in custody and the third is marching the armies there.
Leadership of Gothenland if Heydrich or Himmler is not in the picture any more:
I. Joachim Peiper (or maybe Karl Hanke?)
II. Kurt Daluege
III. Matthias Kleinheisterkamp
IV. Herbert Gille
V. Paul Hausser
While some choices could look weird, all of them would have pros and cons. For example Otto von Habsburg has excellent ties to the Allies and he would be a good figure for peaceful transition and easing tension.
What do you think?
And some pictures for victory events:
http://imgur.com/a/xzva7
(I have more, but some of them have unsuitable insignia on it, so I'll not post them here.)