That's only an example of their bully/victim relationship, and of course it could be very different from the trailers, but it seems pretty clear what is going on, and if that snippet, taken out of context, misrepresents their relationship then why would it be there? And just Batman asking Bane his motives when he poses no threat to Bane, is a little too close to pleading, or asking for a favor. You know what I mean? It is perfectly acceptable for Batman to lose a fight and be captured, but you'd think he'd be more defiant and contemptuous, like Indiana Jones or James Bond, for example, who get beat up and captured all the time, but don't change their attitudes towards their enemies because of it.