Nah, it looks like the trailers so far have only shown the first 20-30 minutes of a movie that’s over 2 hours long. The beginning is going to have to be somber. You can’t kill half the population and not have it be so. Once they’re in space and time traveling that tone is going to change significantly.
Remember you thought the only way Civil War could end was with Cap or Ironman dead or in jail because of the trailers and we all know how that worked out.