Is this Alicization Arc is relatable to the rest of the Anime if so after what anime Is it the Original SAO, SAO ALO or GGO? Trying to remember the order that lead up to this.
Well it is mostly separate from all the other games until you can transfer your char from game to game like in the others. It’s not that dumb a question.
Everything in Alicization, mainly War of Underworld, has been foreshadowed since the very beginning. Aincrad, Fairy Dance and Phantom Bullet foreshadowed the villains. Mother's Rosary and Phantom Bullet foreshadowed the heroes and Aincrad foreshadowed the plot. Everything, but Calibur, leads up to the great War, it all links together.
That's a stretch... you can only say it is foreshadowing if you can show what elements predicted future elements before they actually are released. Foreshadowing isn't something you can reliably identify in retrospect, because you know what happened and you might just be picking out things that look like foreshadowing because you already know what happened.