Hilarious that they might actually be saying that Mufasa is Nala's father also. xD The mention of Nala's dad was the only interesting bit about the episode in my opinion. I just sort of listened to it while doing other things, usually I actually watch.
However, I personally think the guard is a different guard, not Scar's guard. Because scar would've been a cub if Nala's father/Mufasa was a cub, so this would have been the adult guard protecting them. So Ahadi's reign. So the parallels drawn between their appearance and the appearance of scar's guard is just coincidence, imo.
And yeah. Lame song was lame. And that zebra is definitely getting dumber, though herbivore stupidity is something I've come to expect in this show. The female zebra articulating thanks actually bothered me a bit because it was very jarringly "hey! Zebras have a level of self-awareness in this show...somehow." Which begs the question of why they are letting that male zebra call the shots. Maybe the herd leaders are dumb because they get in fights all the time and get their brains knocked around too much. xD