I'll see it eventually, but to me Captain America is Steve Rogers with the super soldier serum. Just like Peter Parker is Spiderman and Clark Kent is Superman. These are characters I've got a lot of childhood nostalgia for--the thing that drives my whole interest in this as opposed to watching, say, foreign and independent films, that would undoubtedly make for a better filmgoing experience. And it feels icky and wrong when they sub them out with various other characters, no matter what more modern comics tell us or what the script writers and producers feel makes for better stories.