Disney XD XTRA - 2009 Avengers Premiere was released on: USA: 2012
Disney+ or Amazon Prime Video.
Avengers Assemble doesn't air on Disney Channel. It airs on Disney XD, although it is currently between seasons. Season Five, Avengers Assemble Black Panther's Quest, begins sometime in 2018. Check Disney XD's schedule.
Disney XD
Disney XD XTRA - 2009 The Avengers Earth's Mightiest Heroes was released on: USA: 2011
Disney's D23 Armchair Archivists - 2010 Avengers Edition was released on: USA: 2 May 2012
The Avengers Earth's Mightiest Heroes aired from Sep/22/2010 to Nov/11/2012
Avengers Assemble or Marvel's The Avengers are 2012 movie about the premier superhero team of Marvel Comics, a subsidiary of Disney Pictures. The length of period Avengers Assemble last for depends on the threat and danger they are facing, sometimes can be months or years on end.
Disney owns ABC.
If the Hulk got fired from the Avengers, he would probably form his own group.
Superman is from DC comics, movie rights owned by Warner Brothers. Avengers are all from Marvel comics, movie rights owned by Disney
Disney started to remodel and update its ships in 2013. One of the new additions is a Marvel Avengers Academy to entertain the children.