By now you have probably heard that the #RingsofPower score foreshadowed the season climax, the Sauron reveal, because Sauron's theme is Halbrand's theme backwards and in minor. But this explanation doesn't really do McCreary justice, so let's take a closer look. Neither of these techniques are new or groundbreaking. Plenty of scores have motifs that can be played in retrograde, or inverted, or both at the same time etc. And playing a major-moded theme in minor is so common as to be cliché.