Here's the 411 on what you're watching;
During a routine day on the job, Dredd is assigned to train and evaluate Cassandra Anderson (Thirlby), a rookie with powerful psychic abilities thanks to a genetic mutation. A heinous crime calls them to a neighborhood where fellow Judges rarely dare to venture- a 200 story vertical slum controlled by prostitute turned drug lord Ma-Ma (Headey) and her ruthless clan. When they capture one of the clan's inner circle, Ma-Ma overtakes the compound's control center and wages a dirty, vicious war against the Judges that proves she will stop at nothing to protect her empire. With the body count climbing and no way out, Dredd and Anderson must confront the odds and engage in the relentless battle for their survival.
This clip makes me want to see it a bit more than what they presented on the trailer, but I'm still miffed that Judge Death isn't in it. Was this storyline even in the comics? I don't remember it if it was.