He went on to say that casting will probably be announced in a couple of months, but since it's an ensemble film with "eight people in it" the entire cast has to be put together. As for Dr. Manhattan, Greengrass observed that with a 100 foot high naked blue man, "that's a lot of blue testicles. What a load of blue b--!"
Right now the production design is being nailed down, which he called "massive. There's 6 months of construction underway."