"It's purely a function of time. It's always about just working things out on the schedule. I get very busy. You have to deal with the demands of your moment. I tend to keep my head in the thing I'm doing and I don't speculate or worry too much about what two or three blocks down the thing is going to be. I know all these things will reveal themselves and work themselves out."
He then went on talk more about the his possible involvement in the project.
"The thing about their universe that's fun is that it all cross-pollinates. Even when I was working on the The Incredible Hulk script, I tried to plug in the whole super-soldier serum thing from Captain America."