Re: Why did the League of Shadows want to destroy a peaceful city?
Some interesting posts here. My own take is not so grand - the LOS still saw Gotham as being too diseased and were still determined to impose their "sometimes you've just got rip it all down and start from scratch" philosophy upon the city, with Bane and Talia as collaborators on equal footing, working the master plan different angles (Talia on the inside, Bane from the outside).
SUPERMAN: You know something Bruce? You're not always right.
New 52 Flash SUCKS