When we play a game in an established setting there's generally two things we want regarding the characters of that setting. On the one hand, we want to play those characters and get the feel of being the signature and famous characters of the setting. On the other hand, we want to meet those characters. There is almost never a circumstance where we don't want them to appear at all because why bother playing in the setting in that case. The Arkham series of video games gives us a great shot at being Batman and playing through his storyline from Origins through to Knight (which I admit that I haven't actually played yet). So they have so far provided the a lot of the first desire and a little bit of the second in the manner of encountering all the other named characters of Gotham though mostly via the eyes of Batman. However, there is something to be said for games where you create your own character and can explore the setting of a fictional world through those eyes.