A good question and I see lots of answers here, but there's a difference between planning and when that plan reached a point where the end result became academic.

The "good guys" in positions of power have been especially serious about a plan since 1963 based on the available data. There have been attempts and failures.

This is speculation on my part, but I'm guessing that the result of the plan became an eventuality at some point early on in the Trump Administration. I suspect that once DJT had access to certain levers of power, he was able to do something(s) that cemented the destruction of the NWO.

I sincerely hope a day arrives where we know more of the story. As we see the movie play out, I'm sure there are things we'll be able to extrapolate. But there must be many, many heroes on the inside that contributed to our eventual victory and I hope at some point in the future, those stories are told.