On Haldric:
With the nectarine - he's asking to die, not hungry or missing Tesleen. Patients were given their favorite fruit mixed with poison at the end...
On Garelemald's new threat:
Surely this is Tartarus, currently in the hands of the 4th legion? It'd be weird for the same cutscene to introduce TWO previously unknown mechanical threats
On the 1st and 3rd legions:
FF1 and FF3 were the only two games in the series to take place after (not during) the Apocalypse. Maybe a good sign? Though the 1st and 3rd Umbral Eras were kicked off by the calamities of Amaurot and Allag, so maybe not.
On the White Auracite:
Instead, we're going to rely on Allagan technology. Especially G'raha's red Allagan Eye, mark of a descendant of Allagan royalty. i.e., Emet-Selch. This strikes me as an even worse idea.
On the final two Mysterious Figures:
Paired like this, it strikes me that we're looking at the work of Hydaelyn and Zodiark ... maybe even their avatars, but at least their servants. Either one of them approaching Zenos with a plan to 'hunt Zodiark' has very interesting implications...