Here's something to consider about the Valkyrie planners: they were delusional that the Allies would essentially let things be status quo ante for the aggressors simply because they'd have taken Germany from Naziism to...Prussian Militarism. Furthermore, they'd be coming from a position of armistice/surrender that once again without a single soldier on German soil - meaning yet another stab-in-the-back myth.
The very best they could have done is to stop the slaughter in the camps, provide only the most minimal of troops in the West (but fight just hard enough that the Allies still have to win and pour EVERYTHING into the Eastern front meat grinder. They still would have been forced to surrender unconditionally, but they might have been seen as honorable too late.
Furthermore, the 1944 Valkyrie only would have killed Hitler which would release the German army from its loathsome personal loyalty oath, it nonetheless would mean that the SS and propaganda machines would be quite effectual. If 1943 had succeeded or one of the earlier attempts had worked, then maybe something different would have happened.