So there are legends and prophecy that will be fulfilled, so I guess this is typical from a fantasy game, but it reminded me to Uradinger.
Hmm... Twelve Sages... lead by the stars and prophecy. Twelve gods... but the circle of knowing in FFXIV had six members... maybe some perished? if they truly are Allegan that's a high chance not all of them remain, or not all of them showed up? It's still suspicious...
Some fiends seized the power of the orbs (crystals)... like Bahamut maybe did through Atomos to the Aetherites? The similarities keep going...
Didn't the beastmen tribes had altars to summon the primals and we needed something special to be able to loot them? It's not the same but may be inspired, and we haven't crushed them for real anyway.
Ohhhh... what was that? the end of an era? Fiends (Primals) wanting world destruction? Where have I seem something like that?
We awoke the power of the echo by watching a light, then Luoisoix saved us through a light and at the end of the trailer a light shines making Lou smile...
Different Umbral eras caused by different elements?
Oh and also Garleans, Garlean Empire, etc.. sound too much like Garland, even the aesthetics are somehow similar. Also akin the Judges armors in FFXII, but those are probably based around the same idea.