To me, it depends on what you really mean by “Übermensch”. If you are talking about the public figure, the lacky puppet (Bush, Obama, Hitler, that sort), then there will certainly be such a person held up for public view. But if you mean a person who on his own managed to bring the world into the order he chose, the “Real Übermensch”, that isn’t going to happen.
The Real Übermensch is not a single person. As it is said (very largely true), “God has no respect for the individual”.
The Real Übermensch is an idea, an “Angel”. And that Übermensch certainly is going to happen and in a sense, is already walking the Earth, gathering his armies.
They can and will kill off as many people as they like in an effort to destroy all hope of their competitor, just as before. The first strategy is to weaken all that is not yourself so as to strengthen your relative power - the use of natural entropy, the “Devil”. But the glory that is brought from that strategy turns out to be self defeating and thus is inherently “cast into Hell to rule over it” because that is all it really can do, create Hell, Chaos, perpetual discontent. And is eventually un-admired.
The idea that arises after such an event, is based upon doing the opposite, as is always the case as every over balance inspires counter balance. That is what causes the eras of “light and dark”, the “Days” (in scriptural terms).
But eventually even that swaying back and forth between eras of enlightenment and abysmal darkness becomes the focus of the imbalance and inspires its counter-balance. It inspires the aspiration for balance known as “The End of Days” because true balance doesn’t inspire counter-balance efforts.
So it is really an “Angel”, an idea that brings in the final Übermensch. There will no doubt be a person prompted up to represent such an event as its “leader”; a Jesus, Moses, Buddha, Gandhi, Hitler, Napoleon, or whoever.
But that too is well known and thus they must attempt to destroy any potential ideas from coming to Man as a competitor to their lust for power. That constitutes a “War in Heaven” (already underway). And the end result of that war comes in two steps. One step is when it is clear that the war has been won. The second step is when a quiet, never noticed voice speaks up for the first time, “Umm… guys? Excuse me, guys? What about me?” And in almost a single instant, all of the power gained by all of the lust and warring is shaken and redistributed into the true “End of Days”, “end of typical history” and nothing like what they had imagined or designed.
I doubt that there will be a propped up puppet for that last paradigm shift, but perhaps. So I don’t know if you want to call that an Übermensch or not.