Might as well keep up the Comic to Movie thread trend.
The best thing about Captain America's backstory is that, for the most part, it never changes. Unlike other heroes, their backstories have to be altered slightly so their ages make sense. Tony Stark was first injured in Vietnam, but as time went on that didn't work anymore to keep him his age, so it was canonically changed to being injured in Iraq. That kind of change I can tolerate. Sometimes you just have to. Cap, though, has the built in "frozen for whatever amount of time we need" plot device to always keep him in World War II. So no matter how much things change, whether in comics or cartoons or even movies, we'll always have Cap punching *****.
And really, that's all I'm looking for in the movie. I enjoy Captain America, though he isn't really that high on my list of favorites. I've been reading his book recently, after I caught up with Iron Man and needed something else to read, and he's got a pretty good story. Though, I don't see it being in the movie. Just from the trailers, much like Iron Man and (I'm asuming) Thor are based on the Ultimate Universe, which I'm unfamiliar with outside the the basics.
I do see a few canon inconsistencies, but they don't appear to be so far off that I'd mind them at all. Even the costume shown doesn't look wrong, just a functional version of his original costume. The one that was just a helmet and not a full cowl. The history looks right, the villain is, to put simply, the only villain I'd expect to see in a Captain America movie.
So what I'm looking forward to: Steve Rogers punching *****, and Mad Shield Bouncing Geometry Physics Skills™. Really, this might end up being my favorite comic movie. Though, I will concede that I'll still find issues, but I doubt they'll be anywhere near as epic of annoyances as with the X-Men movies, Spider-Man, and even the lack of butler Jarvis from Iron Man. And yes, I realize that Jarvis in Ultimate is the name of the computer, which makes it correctly done in the movies.
I still miss Jarvis the Butler.