I had an impression that Chevy Chase completely disappeared from whenever he left the Vacation movies in the 90s until the late 00s, when he suddenly resurfaced in Zoom, a Tim Allen vehicle about a retired superhero, and on Community. Apparently what he was actually doing at the time was starring in German/Romanian adaptations of British plays. An American company was also involved, but I sure don’t recall any significant American release.
I always had the idea this was a movie extrapolated from a recurring Saturday Night Live character. My logic was that Fletch is often considered Chase’s most iconic character, and the title is simply the character’s name, as if we’re expected to already know him. When I got the disc and learned Fletch is a master of disguise, it just seemed more logical that this would be a vehicle movie to showcase Chase’s talents. I only found out just now that this is an adaptation of a novel.
Not much has changed in my expectations. I still expect some digressions to do characters more to be funny for a while than to advance the plot. However, since it’s based on a book, the plot will probably be a little more fully realized than with a typical vehicle movie.