Cowboys was pretty damn good, and the plot actually made perfect sense, except one flaw that would give the whole movie away if I even described the slightest bit of it. America was just standard comic book turned movie, the writers and director clearly did not have much room to change things. You might think the end will suck, but its the only way to tie him with the Avengers. But still a pretty good movie. Better than thor, but not Iron Man.
no, Captain America freeze's Captain America. That movie was chock full of stupid plot holes, (no really, at least one every scene almost). Still an Okay movie though.
I viewed watching Captain America is a necessary requirement to see the Avengers. The movie was good, but nothing I would watch again. Cowboys and Aliens was better in my opinion.