No spoilers unless you are incredibly uptight about such things. Also, if you haven't seen it you probably have no way of answering anyway.
Early on in the movie there's a shot in a street scene and you can see a large poster over Jane's shoulder that says something about a "Journey" and featured a guy that looked like maybe he was surrounded by orbiting electrons. Did anyone with faster eyes than me see enough of this to tell me exactly what I glimpsed and if maybe it's an Easter Egg for one of the upcoming movies?
ETA: WinnieTheWoot is telling me that the poster said "Is your journey really necessary?" I found this one from WWII but the image doesn't look like the right one.