With the disillusioned “Eren” controlling the marauding “Titans” trampling everything in their path underfoot, it looks like an impossible task for the folks of “Marley” to thwart this “rumbling”. Maybe, though, “Armin” and “Mikasa” can find a way to thwart him by combining their skills and forcing mankind to reconcile their different factions and join forces too? It’s a conclusion to a series but stands alone well enough for you not to have followed that as this vivid, if not exactly detailed, animation takes us on a story of treachery, loyalty, and even a degree of light psychological…