The original plan was to create a made-for-TV special, but fan response made the producers create a theatrical movie instead. As the "Get Smart" TV show was a spoof of James Bond movies, the movie was a parody of the then-recent Bond movies starring Roger Moore, as indicated by the plane-jump sequence at the beginning and Agent 86 having love interests other than Agent 99, despite the fact that in the TV show he had already married 99 and had twin children. So we end up with a mixture of both worlds where Maxwell Smart looks like a fish out of water. Without Agent 99 or the Edward Platt Chief (admittedly the actor had died so that was impossible), the comedic interaction that made Get Smart work isn't there. It's akin to "The Honeymooners" with only Ralph Kramden.
The movie itself is mildly amusing, a rather cute idea of a villain who uses bombs to destroy clothing so he can make all of humanity dress in clothing that he produces. That would seem to have been a great idea for a Get Smart episode in itself. But though Don Adams tried, it is clear he couldn't go it alone. That mistake would fortunately be remedied in the 1988 made-for-TV reunion.
The movie itself is mildly amusing, a rather cute idea of a villain who uses bombs to destroy clothing so he can make all of humanity dress in clothing that he produces. That would seem to have been a great idea for a Get Smart episode in itself. But though Don Adams tried, it is clear he couldn't go it alone. That mistake would fortunately be remedied in the 1988 made-for-TV reunion.