Are there any specific episodes of the original MOTU I should watch before I start Revelation/lution? I've never watched MOTU and I find the new series interesting mainly due to the people involved. I've also been curious about MOTU for a while now, since I've seen a lot references to it over the years.
Not really. The new show is only loosely a sequel; it has the surface form of a continuation, but is more of a remix in a subtly different continuity. It basically stands on its own, though there are homages a fan of the original would recognize. But it's distinct enough in tone and approach that it might feel a bit jarring to go directly from the original kids' show to the older-skewing pseudo-sequel.
And really, the original series dated from an era of purely episodic TV, so there was little in the way of continuity. There were a couple of character threads the original show set up without resolution that the Smith show has paid off, but they're sufficiently re-established in the Smith show.
Ah, by the way, after watching a few episodes you might want to know why Prince Adam didn't reveal his secret identity to Teela (a valiant warrior) or to his parents (who would also be his king and queen ), but a flying buffoon knows it anyway. We have come to an answer here, after long discussions: "because".
I think it's kind of implicit in "I am Adam, Prince of Eternia, and defender of the
secrets of Castle Greyskull."
Plus, of course, it was the default logic of superhero stories -- "My loved ones must not know the secret, or my enemies may harm them to discover it." Which is nonsense, of course, because if the enemies even
suspect they know the secret, they could still get abducted and tortured for it even if they don't know, and their ignorance just makes them more vulnerable. (Not to mention that the main character's loved ones tend to get abducted and threatened all the time anyway in superhero stories.) So it's more about protecting the hero than the loved ones, since if the loved ones did know and were tortured into revealing it, or gave it away accidentally somehow, it would make the hero vulnerable to attack in their civilian form.
Which is why He-Man kept the secret and relied on his impenetrable disguise of a change of clothes, a magic spray tan, and a booming, echoey voice. Hey, it's no worse than a suit and a pair of glasses.
And hey, it's lucky nobody ever wondered why Adam's sword looked exactly like He-Man's, or why a lazy, dissolute prince with no fighting skill went around carrying a sword in the first place.