In The Presence of Mine Enemies

I recently read Harry Turtledove's book In The Presence of Mine Enemies. I found it very entertaining, even if it had some flaws. But it had made me thinking.
How will the future look like in this TL? Even if, is scenario heavily borrows from the collapse of the soviet union in OTL. I can't see the Nazi empire collapsing like the soviet's. The economy is doing well and there is no better system around anymore.
So what do you think will happen in coming years?
 
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