In an epic test of endurance and sanity, the AMC and Regal chains have announced they'll be running the "Ultimate Marvel Marathon" beginning at 6p.m. on April 29 -- showing all 11 Marvel movies starring the respective and collective Avengers, plus that gang from Guardians of the Galaxy,  back-to-back-to-back-to-back and so on. And on.

That’s right, 29 straight hours of Black Widow and Captain America, the Hulk and Iron Man, Thor and that guy with the bow and arrow – plus those Guardians dudes, with

Bradley Cooper

, as the voice of Rocket the Raccoon, quipping “It’s not Bugs Bunny in the middle of

The Avengers

” – all of them trading wisecracks and punches with supervillains of every stripe. To cap the Marvel mayhem,

Avengers: Age of Ultron

, reteaming

Robert Downey Jr. Chris Evans, Chris Hemsworth, Scarlet Johansson, Jeremy Renner

and

Mark Ruffalo

, will debut. Those in the audience who are still conscious may recognize

James Spader

rumbling with villainy as the voice of the metal-alloyed megavillain, Ultron.

Joss Whedon

directs the latest entry in the Marvel Cinematic Universe.

Here's the schedule:

  • 6 p.m. IRON MAN
  • 8:25 p.m. THE INCREDIBLE HULK
  • 10:35 p.m. IRON MAN 2
  • 1 a.m. THOR
  • 3:10 a.m. CAPTAIN AMERICA: THE FIRST AVENGER
  • 5:30 a.m. THE AVENGERS
  • 8:48 a.m. IRON MAN 3
  • 11:15 a.m. THOR: THE DARK WORLD
  • 1:45 p.m. CAPTAIN AMERICA: THE WINTER SOLDIER
  • 4:20 p.m. GUARDIANS OF THE GALAXY
  • 7 p.m. AVENGERS: AGE OF ULTRON

And here are the area theaters committed to this folly:  AMC Deptford, AMC Loews Cherry Hill, AMC Marple and UA King of Prussia.