I think that Superman still stands for truth, justice and the American way. To me "the American way" ment personal freedom. I also believe that the US is and has been diverging from the American way for years, heck decades now.
If this is the case, and if many consumers believe this as well. Then you are going to get into a conflict of Superman being set up in conflict of this divergence. People will wonder why it wasn't addressed. If they do address it than it will inevitably piss off other consumers.