I agree that there is a real possibility that the debates will be cancelled. But what will be the reason? If hitlery offers lame excuses, questions will come up as to her health and competency right away. Can hitlerly come up with a double that can take her place? (like Hitler had?)
That means that there would need to be a real excuse like a national emergency (war, economic collapse). And if something like that happened, the elections would probably be postponed (which means cancelled)