I take his [Theodore Geisel] legacy very, very seriously. I know others may disagree because he's made such an impact on so many people that response to work becomes very personal, so people will have different points of view. But, at the core of this, I take the protection and the extension of his legacy very, very seriously. It's a very important part of my life.

We have a process that continually looks back to him for guidance, but it also combines that with a tremendous amount of discovery and invention, as well, because of the demands of the medium and the opportunities of the medium.

No matter what happens with technology or whether you're in traditional animation or stop-motion or CG, the biggest challenge always is story. The flow of making the movie is usually determined by how your story is coming together, and when your story is straining and you can't quite get your hands around it, your entire production is straining.

Tone is an interesting question because part of the inspiration of looking to song is that Geisel himself - when you think about his animated version of The Grinch - embraced the idea of using songs in unconventional ways, as part of conveying a narrative. The use of music, in this film, is very unconventional, which I love.

When you take that to the next level of guiding a group of filmmakers to actually depict him, it's even more challenging. The one that that I think everybody involved believes is that we won't move forward with this until we believe it's right. There's no deadline that a movie has to be made by. We have to believe that we have served the responsibility, however long it takes us to get to that point.

Being branded to some subset of your fans is important when it comes to creating films and characters they're not familiar with. It's enormously difficult to market to a global audience, and it's becoming more difficult. A brand matters to parents, whereas kids are largely driven by their urgent reaction to the product. In the future, where there are going to be choices that have to be made by parents because it will be prohibitively expensive to access everything, those will be driven partially by brand.

It is incredibly daunting to take on a live-action story. I think that it adds a level of complexity to the responsibility that goes beyond what I've experienced on these two films (The Lorax and Horton Hears a Who).