Johnston said: "He wants to serve his country, but he's not this sort of jingoistic American flag-waver...He's just a good person. We make a point of that in the script: Don't change who you are once you go from Steve Rogers to this super-soldier...It'll be interesting and fun to put a different spin on the character and one that the fans are really going to appreciate."
What is potentially revealing about Johnston's talk is how he also talks about the difficulties comic writer Ed Brubaker's current run on the Captain America comic encountered with its representation of Cap as a "flag-waver" and what that meant during George W. Bush's administration, when Brubaker's tenure on the title began. It's interesting because Johnston, like Brubaker, wants to make Cap someone that's not beholden to politics of either the modern right or left wing but does want him to be "the spirit of doing the right thing." Finding relevance without being specific in his sociopolitical criticism is going to be tricky, especially since the story will likely take place entirely during WW2, leaving Cap to be resurrected in the present day in the forthcoming Avengers movie. I wish Johnston luck and hope all this consideration makes for a smarter movie than, ugh, The Wolfman.
Read more of Johnston's interview here.