Marvel Universe, on Disney XD
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This is a Sunday morning block of cartoons based on Marvel comic books. It debuted in April 2012, but since I haven't had Disney XD since probably July 2011, I've never been able to see it. It included the second season of The Avengers: Earth's Mightiest Heroes (2010-2012), of which I had seen the first season before the block was created. Other shows in the block include Ultimate Spider-Man (2012-2017), Avengers Assemble (2013-2019), and "Hulk and the Agents of S.M.A.S.H." (2013-2015), none of which I've seen at all. And I guess sometime in 2015, the block was renamed "Marvel on Disney XD." Later shows in the block include Guardians of the Galaxy (2015-2019) and "Marvel's Spider-Man" (2017-2020).

In May 2020, I started watching some of these shows on Disney+, but it's going to take a long time to get through all of them. And I'm going to try to watch them more or less in the order they aired, which means some may take me a few years to even start.