There were radio shows where you actually got to hear people play off of each other and get that immediate magic that goes on. And rather than doing what a lot of shows do, where an individual comes in, reads their part, and you edit it together later on and try to build a performance, we're lucky because this is really very much a theatrical performance that is going on, every single week.

It really showed that you can do a major motion picture, from the folks at Marvel, that has multiple characters on an epic scale. On top of that, it also showed us that one of the most important elements is a certain kind of levity.

When we approached the Man of Action guys, we said, "We're not really interested in what's come before, except in the way that we want to make sure that it feels like it's Marvel's Avengers Assemble. From that point on, this is your cast. Go to it and tell great stories."

While we do have 50 years of terrific Avengers stories, many of which our writing staff has written, along the way, this has to live in its own world.

We want to be able to let the audience get to know these folks. One of the things about The Avengers, over the last 50 years, is the fun of changing up the gang and bringing in new characters.

This is, in fact, the biggest show that Marvel television has ever taken on, in the animation world. We had a real challenge that was posed to us, and that was this little, tiny art-house movie that came out last year, that I don't know if you saw, called Marvel's The Avengers, written and directed by our friend Joss Whedon, and it really set the template.

One of the things that makes this show unique, in terms of an experience, is that when you do a show that has a large cast, scheduling is a very difficult thing.