I know it's a bit TOO early to be talking about Captain America: New World Order, but the one thing I hope Marvel doesn't ruin in New World Order is Samuel Sterns/The Leader.
Now I'm not sure if anyone or anybody agrees with this, but I like Abomination's design in Shang-Chi and the Legend of the Ten Rings and She-Hulk: Attorney at Law than his design in The Incredible Hulk. Abomination and the Leader are Hulk villains, but unlike the former in which they used in a Hulk-related production, the latter is instead in a Captain America movie. I don't know why they decided to do this, but hey, at least Samuel Sterns/Mr. Blue/The Leader is coming back in a Marvel Cinematic Universe production since we last saw him in The Incredible Hulk.
Now back to topic. Your all probably wondering what I mean by "how will Marvel ruin The Leader?" Well let's just say that Marvel better not make the Leader ugly-looking and/or not comic accurate like DC and Warner Bros. did with Hector Hammond in Green Lantern because Hammond's design looked TERRIBLE and HORRIBLE in that movie. Let's hope Marvel doesn't do anything wrong with the Leader's design because at this point, The Leader is New World Order's selling point for fans to watch the fourth Captain America movie in 1 or 2 years.