Is it possible that this movie is actually a retelling of Warcraft, hence the shot of Stormwind is from "the present", as in WoW-era?
They could basically be teasing the sequels within the first movie itself, so that newcomers understand how this isn't just one movie. Otherwise, the way the movie would end might disappoint a lot of people who don't know about Warcraft's lore. But by saying "here is what happened up to now", they would already know that the end of the first movie can't really end in the traditional way, much like people knew the end of Fellowship wasn't the end, but everyone knew that.
