How do you want him to show you "the real stuff" when it's never been adapted in a Batman movie (as of today)? Superman's costume looked great in the Reeve movies.
It´s easy to point to an illustration and say: "I want this". But "This", most of the time, only looks good on paper. And the Reeve costume is a good example of what i´m talking about. It´s faithful to the comics, but at the end of the day, it doesn´t look as cool as it does in the comics. It basically looks like a guy wearing spandex or something like that. It´s understandable given the time the movie was made (same can be said for the 1966 Batman costume), but it still looks kind of silly.