Jim*Tod
Supporting Actor
Yes, it is interesting that '66 didn't produce any box-office hits with takes well over the $30-35 Million range (at least, in that calendar year), yet '65 had three mega-blockbusters that made much more than that, box-office hit phenomenons actually, and '67 produced eight movies that took in significantly more than $30-35 Million.
So I clicked on the year 1966 In Television and noticed there were several prime time color television debuts in the USA that year. Also, three television series debuted in '66 that got tons of media coverage, pop culture attention and viewership interest; Batman, The Monkees, and Mission: Impossible (Star Trek, too, but I don't know if many people were staying home to watch that series to talk about it the next day the year it debuted, but I could be wrong about that).
Unless I am missing something obvious, I can't exactly say the same for prime time color television events and notable pop culture television series' debuts for '65 and '67. Maybe television made more gains in its war against the movies that particular year of 1966 than the year before or after..?
https://en.wikipedia.org/wiki/1966_in_television
That is an interesting theory. And of course we were entering the late sixties where the cultural climate of the country was changing very rapidly. Hollywood was somewhat behind the curve. I also wonder if there was something of a glut of big budget roadshows too.... some succeeded at the box office but many died there and most of the major studios were in bad shape by the end of the decade.