Marvel Avengers Assemble The Avengers vs. Hyperion This Sunday, August 2, MARVEL’S AVENGERS ASSEMBLE returns with an all-new episode airing at — 8:30am/7:30c inside the Marvel Universe on Disney XD. Tune in for the brand-new episode “Avengers Underground” where the Avengers must pretend to be dead to save the world from the Squadron Supreme! BIG HEROES! BIG VILLAINS! AND BIGGER ADVENTURES this…