Pretty much this, yeah.
In regards to the actual plot, my theory is that the Horde will, with the aid of Bwonsamdi, and the Alliance with the aid of Bolvar, plunge into the Shadowlands after Sylvanas and Helya.
Sylvanas will abscond with all the Horde’s Azerite and most of the Alliance’s after gaining the aid of Lady Ashvane and Gallywix to steal it and surrender the lion’s share of the substance with Helya, who seeks to not only free herself from her shackled existence as the first and most powerful of the Val’kyr, but restore herself to Titan Watcher status with an actual body purged of all of Loken and Yogg’Saron’s influences.
Of course, along the way we’re exposed to the ‘boss’ of Bwonsamdi and even Helya, the World Soul of Azeroth itself who devours the souls of the Living that wander, unclaimed, in the Shadowlands for long enough that their individual sense of self and consciousness has faded to nearly nothing, and uses the released energy to further her own gestation and to produce more Spirit energy, which is necessary for both Elemental and Organic life to flourish on the planet she occupies, and the presence of that life draws in the Light, which further increases the life on the planet, which in turn dies, is drawn into the Shadowlands and the process repeats itself.
Helya’s goal, however, while not running counter to this cycle of death, consumption and reincarnation, still throws a wrench into things since in the thousands of years of Helya’s existence as a Val’kyr, she’s become a part of the system and her removing herself and returning to being a Titan Watcher could cause a chain reaction since there’s other, far less benevolent beings in the Shadowlands who would just love to step in and feed off the abundant flow of life energy, souls and spirit energy, and there’s also the Old Gods who have their souls dwelling in the Abyss, the plane of existence where the Void and the Shadowlands meet who are also quite eager to abuse the situation to finally complete their own mission and convert Azeroth into a Void Titan for their masters.
With both the Horde and Alliance struggling with the revelations they face in the Shadowlands and the so-called heroes of the Story stuck for months in a realm of shifting phantasms and lost souls from various periods of time, as well as drifting through the various afterlives and dealing with the repercussions of meeting actual gods who may not entirely live up to their living followers’ doctrines, Azeroth’s nations groan under economic collapse, famine and civil unrest that threatens to tear both the Alliance and the Horde apart from within even as their beleaguered armies square off over the resource-rich islands exposed during the aftermath of Sargeras stabbing the planet and people who should know better continue to push for satisfaction for their personal vendettas as the world threatens to burn to ashes around them.