Honestly, I'm not sure how I feel about this one.
On the one hand, the U.N.C.L.E. property has been lying fallow since 1983, which is way, way, way too long for a franchise with these kinds of legs. ON the other hand, the fact is that it was never a particularly good show. Lots of potential, and good production values, but it was really uneven. In the early days, it was like "Queen for a Day: The Spy Show," with a useless housewife or waitress getting dragged into service, so that Napoleon and Ilya often felt like guest stars in their own show. Later, endlessly revolving behind-the-scenes producers kept the show from ever really deciding what it wanted to be when it grew up. I mean, when you think about it, not even the title makes sense: Shouldn't it be, "The Men from U.N.C.L.E?" I mean, it's about two guys, right? Granted, "Man" is cooler, but still.
On top of this you've got Randy's First Law Of Spy Shows: They WILL descend into sillyness and self-parody (Deliberate or otherwise) in short order. Take any classic spy show, or even the modern ones.
On the other hand, it does look kinda' cool, and the decision to make it a period piece rather than contemporary is brilliant.
(Sorry about the link, I couldn't get the video to embed)
On the other other hand, however, Guy Ritchie is directing and he basicaly sucks. I note they never mention U.N.C.L.E. in the trailer itself, and there's no mention of T.H.R.U.S.H. either, which I take to mean this is an origin story for both groups. Also, I note they didn't use a scrap of the Jerry Goldsmit theme. I'll end up going to see it, of course, but if they don't use the theme at least once in the film, I do believe I will murder someone. Probably Guy Ritchie. No, he was married to Madonna. He's suffered enough. I'll probably murder Madonna for bringing Guy to this.