This news comes from WB's private Exhibitor site, which confirms in their Placements section that this third trailer is arriving in theaters on May 4. It is not known when the trailer will hit the internet, but it promises to contain all-new footage. If you didn't have a reason to see Marvel's The Avengers in a theater before, you do know. May the 4th be with you!
Marvel's The Avengers was released May 4th, 2012 and stars Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Tom Hiddleston, Clark Gregg. The film is directed by Joss Whedon.
The Dark Knight Rises was released July 20th, 2012 and stars Tom Hardy, Christian Bale, Anne Hathaway, Liam Neeson, Joseph Gordon-Levitt, Gary Oldman, Marion Cotillard, Morgan Freeman. The film is directed by Christopher Nolan.