DragonRanger
I don’t see it happening, at least not a straight-up adaptation. The season premieres have always dealt with some ancient evil threatening present-day Equestria. I don’t see that changing with season 4 just because Twilight’s now a princess.
Besides that, I’m reminded of something involving the Rarity micro comic. It was originally going to have a different story, but Hasbro scrapped the idea because it was too similar to an episode for season 4. Considering when the Crystal Heart Spell book came out, it’s very unlikely that Hasbro would have let it be published if it was just going to be adapted into the season opener.
Besides that, I’m reminded of something involving the Rarity micro comic. It was originally going to have a different story, but Hasbro scrapped the idea because it was too similar to an episode for season 4. Considering when the Crystal Heart Spell book came out, it’s very unlikely that Hasbro would have let it be published if it was just going to be adapted into the season opener.