Phoenix, who turned down playing both Hulk (to replace Edward Norton) and Doctor Strange for Marvel, tells
Total Film:
“It took me a while [to commit]. Now, when I look back, I don’t understand why… There was a lot of fear, yeah. But I always say there’s motivating fear and debilitating fear. There’s the fear where you cannot make a fucking step, and there’s the kind where it’s like, ‘OK, what do we do? That’s not good enough.’ And you’re digging deeper and deeper. I love that kind of fear. It guides us, makes us work harder.”
For director Todd Phillips, there was only one person who could have played this version of the Joker. "We wrote this script for Joaquin. It’s true," he says. "Joaquin knows it. Half the reason we wanted to even attempt writing it was, ‘Man, imagine if we get Joaquin. Think of what we could do.’
The goal was never to introduce Joaquin Phoenix into the comic book movie universe. The goal was to introduce comic book movies into the Joaquin Phoenix universe.”