spoilers for some.
A scrapbook has revealed some bios for both Catwoman & Bane. Catwoman's is fairly simple: "SELINA KYLE – is a world-class cat burglar and mistress of disguise. She’s cunning and devious, but has a deep sense of honor. As Catwoman, she targets Gotham’s wealthiest. Her weapons usually include infrared goggles, bladed high-heel boots, and a belt filled with lock picks." Rumors have been circulating and I've been saying that I expect Catwoman/Selina to begin the film stealing from the wealthy people of Gotham to help the poor, also helping Bane. Eventually she realizes how extreme & dangerous Bane is and will switch sides to help Batman (Christian Bale). The commercials seem to point that way. Rumors also say Bruce will reveal himself as Batman to her, helping change her opinion. She'll realize not all rich people are snobs and crooks, when Bruce is risking his life for Gotham. So we'll probably see them fight, flirt, fight again, make out, team up. Just rumors, of course.
Bane's goes a little deeper into his backhistory, and mentions the League of Shadows. Which is probably where Liam Neeson returns as Ra's al Ghul in a flashback. "BANE – Little is known about Bane. He was born in prison and trained in the darkest forms of deception by the League of Shadows, but rumor has it he was cast out due to his extreme behavior. Bane is a ferocious hand-to-hand fighter who is willing to do anything in order to take down his opponents. Bane is in peak physical shape, but he must wear a breathing apparatus that feeds him with pain relieving gas due to an old injury. He’s never been photographed without his mask and only a handful of people have seen his face. While his true motives remain a mystery, he appears to be building an army of followers in the dark tunnels underneath Gotham in order to create his own League of Shadows."