A time the world is still garnished by deadly flora = Pulse Tangrowth
Beaded Tooth Necklace = Fern
Spiked Bracelets = Arclight
Azure Hair = Blake, Cal, or Amaria.
Sleeping Star = Ana
Tactiturn woman = Either a new character or Shade. I lean towards shade (possibly the same character in the E18 Dream Sequence?)
Together they defeat Pulse Tangrowth, Muk, Swallot, and Camerupt, then the city streets crack, and Arclight 'splinters' below.
Shining armor strikes, Azure hair is re-dyed red.
Shining armor is odd, I dunno what to think of it. Titania comes to mind. The player character is the only character who is really referenced to as "shining", whereas Lin and Taka are the only characters shown to wear armor.
If Azure hair = Amaria, "shining armor" referencing titania is a stronger idea.
If Azure hair = Cal, then the phrase "re-dyed" makes the most sense. I don't think other candidates for azure hair could "re-dye" their hair red if it was never red to begin with.
If Azure hair = Blake, idk
Its an ominous vibe, things that get dyed red are usually done so with blood in fiction, so this implies a death.
An enemy of his own blood stands before him, and beaded hope breaks apart upon the tattered stones of a city forced to live up to its name once again.
"Enemy of his own blood" could reference Cal/Blake or Fern/Florinia. Other notable pairs including one male involving bloodlines are Cain/Aya, Radomus/Ana, Noel/Ana, Corey/Heather, Bennett/Serra, Taka/Solaris, El/Luna, and Hardy/Titania. I doubt any of those are it, but I figured I would list them anyways (although I probably forgot some). 'Beaded', probably being fern, is the subject of the sentence following the comma so I think Florinia/Fern are the likely combo. After that, I guess something happens to Fern and the city is Reborn? I assume this isn't a good rebirth, considering-
The sleeping star invokes a wish. From there, the suited girl disappears.
If things were good, why make a wish?
And that future follows shortly after...
Hmm.
The fortune teller says "that" instead of elaborating. What is "that" future? You could argue multiple "thats"
General foreshadowing in the game points towards universe resets, time loops, arceus egg shenanigans, etc.
This prophecy could be interpreted in a lot of ways until E19 comes out to give the definitive answer.