So you think the narrator literally changes during the prologue, but keeps the exact identical voice and style? Yes, it's his son, but come on, no one literally inherits the voice of their parent to such a degree.
On another note, with regards to the many reactions from North American viewers... Seems to me Blizzard should move to Europe or China because, holy fuck, that's a lot of irrationality going on in NA. We even have a few potential substance users in this thread, complaining about the Warcraft cinematic universe beginning at the... Oh my god, beginning. Well where else should it have begun, lol?