So we know some Field Marshals and other high ranking officers knew about the plots against Hitler.

What if Admiral Wilhelm Canaris and General Hans Oster were never arrested?

What if Field Marshals Erich von Manstein, Gunther von Kluge, Erwin Rommel, and Fedor von Bock joined Erwin von Witzleben in becoming active members of the July 20th plot?

With 5 Field Marshals, and both Wilhelm Canaris and Hans Oster still in play, how successful do you think the July 20th plot will be?