Young Justice is still one of the best superhero shows ever in Season 4
Superhero fans are seeing, in real-time, the challenges of having a long-running live-action superhero universe. Bringing the Avengers together gets trickier when you have to deal with actors' schedules, salary demands, and the general ravages of time (and that's before we even talk about dueling studios who are tenuously sharing custody of a character.) It's a big part of why Captain America and Iron Man have, in various ways, made their exit from the MCU. A comic book superhero universe — or an animated one — doesn't really have this problem.
Source: syfy.com