KJV English Bible, TR Greek New Testament, Strongs exhaustive concordance, Zondervan analytical greek lexicon
Nope.
The "preconceived narrative" is the 'preterist' view - that [the] "all things" were fulfilled before the generation that was alive when the passage was written [all] passed away. And, understandably so. For - "on the surface" - the [English] wording certainly "appears" to say so.
However, if you "dig a little deeper" (perhaps [even] more than "a little"), you should find that the idea of 'commencement' (of the prophecy) is 'embedded' in the [Greek] wording of the passage - meaning that the prophecy (the "all things") would 'commence' to unfold - or, 'begin' to occur.
In other words, the "all things" would begin to come about before that generation passed.