Well, we do see Cap both in his Ultimate costume (which I hate) and in his classic costume with the real shield, so that's definitely going to get addressed. I also caught a glimpse of what looked like Cap breaking loose from somewhere.
By the end of the second act (the end of the action in London), I was already ranking it among my top Bond films. It was paced so well that I had no idea we still had an entire 3rd act. Speaking of which...my god. What a glorious third act it was.