Nothing is inevitable. Many "inevitabilities" failed to develop for many reasons; many innovations which they told us, in the 1950's, were "inevitable" by "the Year 2000" --- personal jet-packs of individual flight, World Government, tourist voyages to Mars, urban spaces transformed along the lines of Habitat '67 by Moshe Safdie --- turned out to be "futures whose time has passed."
Hydrogen dirigibles were the "wave of the future" until the Hindenburg disaster. A large and well-publicized human-genetic-engineering horror could take elaborate artificial-reproduction and human genetic engineering off the agenda for centuries.
One can hope.
Quite a lot of things are inevitable. Death and taxes come to mind. Evolution is inevitable, too - and homo super is a logical progression from homo sapiens.