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Interesting page 9 headline: “Nazis talk of tightening defense until “super-weapons” beat Allies”

Luckily for the German people, they weren’t able to tighten them enough, otherwise about a year from that publication, they might have experienced the effects of an actual “super-weapon”. Wide-spread use of V2’s and jet planes certainly could have had a major effect in the war, but there’s nothing like nuclear fission to really get someone’s attention.

And to punctuate the irony, had that happened Hitler would then have reaped the harvest of policies that drove so many Jewish scientists to Allied countries.

" to punctuate the irony, had that happened Hitler would then have reaped the harvest of policies that drove so many Jewish scientists to Allied countries."

Excellent point, imho, if I dare say this: one of the fundamental spiritual lessons of the Second World War.

But on the issue of Nazi "super weapons" -- Wunderwaffe -- it turns out, there's a huge list of them, over 130 different weapons systems by my count.
They included:

A 57,000 ton aircraft carrier (1/2 again larger than US Essex class carriers).
A 140,000 ton battleship (twice+ the size of US Iowa class ships).
U-boat "electro-boot" designed for full underwater operations.
Submarine aircraft carrier.
Kugelblitz -- self propelled anti-aircraft gun.
Junkers Ju 322 Mammut, flying wing heavy transport.
Junkers Ju 322 & other Amerika Bombers, six engines 8,000 mile range.
Messerschmitt Me 323 Gigant, heavy transport.
Messerschmitt Me 262 Schwalbe, jet fighter.
V-2 ballistic missile.
Super-heavy tanks ranging from 100 tons to 1,500 tons!
Schwerer Gustav (Heavy Gustav) – an 800mm railway gun.

Finally there was the German nuclear weapon program, Uranverein.
From the beginning it was doomed to failure, for lack of support, though some people claim Germans did produce & test something radiological.
No evidence confirms such claims.

So it's hard to imagine today how any of these super-weapons might have changed the war's course by even weeks, much less months or years.
Still many such German projects were completed and improved on after the war, and some (i.e., ME-262 jet fighter) could even have changed the war if fielded sooner and used more effectively.

Allies inspecting German Uranverein facility: