Iron Man, The Incredible Hulk, Iron Man 2, Thor, Capt. America The First Avenger, Avengers Iron Man 3, Thor the Dark World, Capt. America The Winter Soilder, Guardains of the Galaxy, and Avengers Age of Ultron. Thats right 11 movies for 24 hours and like a real marathon if you endure to the finish you get a medal.
Its $70 and so far only at 3 theaters but if you're interested here is the link https://www.amctheatres.com/avengers