Re: The Dark Knight Rises teaser media.
It's quite alright if you don't read the comics because comics are pretty much a dying media nowadays and nowhere near as successful as they were 10 or 20 years ago.
The problem with Bane is that media (TV, movies, cartoons, etc.) often portrays him as this huge brutish idiot who can't think on his own. Usually, this means he is a tool for some other villian, or simply is used to destroy stuff. Bane is much smarter than he is usually portrayed, and given this is Nolan, I am confident he will use Bane not only for his brawn but his brains as well.
If you didn't read the comics, which is fine nowadays given how much these characters have grown from being in panels to starring in blockbusters, you would no know this. Anyway, Bane is much more complex than he is usually portrayed, so I think Nolan made a good choice here.
Catwoman doesn't appear to be a villian here, but more a stand-in hero for Batman. If you see the teaser in front of HP7 (which I read a text translated version of), you'll find it seems Batman has gone into hiding. This means that crime will rise again, and Catwoman will fill Batman's shoes, so to speak. At this point, Batman will likely be a legend as Ra's described in the original movie because he disappears(again, my specualtion). It seems Batman will have to redeem himself and either work with Catwoman, who may become his opponent at this point, or fight her.
Talia has not been confirmed, but some mysterious woman (whom I forgot the name of) is climbing the ranks of WE. Here, it is specualted that she is Talia. I don't know much about her to approve or negate this, so it may very well be Talia or simply a new love interest. Ra's' flashbacks may be from "Talia", or Bruce. As I said before, Batman's fallout would cause him to reach legendary status as the Dark Knight who disappears after bringing the terrorist known as the Joker to justice, and taking the blame of the 5 homicides. Therefore, Batman will be a legend, and Gotham citizens will fear him because they believe he killed 5 people and he was able to cripple the criminal systems.
Nolan has some leaveway as to what he does with these characters(Batman, Catwoman, Bane and Ra's), so he will make another great film. The real question here is, will Nolan be able to top The Dark Knight? Stay tuned, same bat-channel, same bat-time!