A quarter million years ago our ancestors were humanoid but not us. Primate social cooperation traits were there but megalithic structures are not seen until 15,000 years ago despite homo sapiens being around for 100,000 years. We are the builders. Perhaps older structures may be found but an Ice Age and great floods could have obliterated the evidence. The capacity for language is more powerful than muscles when it comes to building.
100,000 years is a blink in the fullness of time.

Could such a blink have occurred and failed long before homo sapiens?
As Stilly said, "it's a matter of science fiction".
There are many dead ends in evolution but there is no fossil evidence for such a prehistoric blink.