Regarding the 5.0 cinematic opening:
The scenes from the Visual Works opening include canon background information, showing Thancred's rescue of Minfilia, along with Y'shtola and Urianger in the great fire. But what about the main scene with the Warrior of Light in the Ghimlyt Dark?
Is that scene, instead, from the unaltered timeline of the Eighth Umbral Calamity, where the Alliance and Scions were all wiped out by Black Rose? And did the Warrior survive long enough to wander the battlefield, only to be killed by the arrival of Sin Eaters upon the Source?