I don't know if this has been pointed out yet but I just realized this morning that the first two quotes of the trailer "Hope is Lost", "Faith is Broken" actually nullify s the endings of the first two films. Nullify might be the wrong word but still.
Think about it:
At the end of Batman Begins, Gordon says there is now "HOPE" on the streets.
At the end of The Dark Knight, Batman is rewarding Gotham's "FAITH"
It looks like everything Batman has done before will be undone before a fire will rise.