After stopping the apocalypse Taylor Hebert is shot in the head. However, a mysterious force grateful for her actions in saving the world saves her and subsequently transports her to Equestria, transforming her into a Changeling Queen.
The Chosen Undead is on the verge of undoing the curse of undeath cast upon humanity by Lord Gwyn, when he falls for a trap laid within the First Flame and is transported to Equestria, over a thousand years in the past.
Just as the Commander, Areelu Vorlesh, and the Commander's companions were about to use the nahyndrian crystals to ascend to become demigods, the gods intervened and banished them far beyond even the Maelstrom, whereupon they end up in Equestria.