I'm curious about the ghosts and ghost ships with Jaina. Are those reflections in her memory, or is she dabbling with Drust magic or some sort of spirit-binding arcane necromancy to bring to bear against the Horde? I believe there are examples of interactions between ghosts and the arcane around Karazhan and with older Kaldorei sites and the Shen'dralar.
Is spiritual medium the new direction for the Lady of Theramore? Or are these merely visions and memories? This is all feeling very Pirates of the Caribbean, and somewhere between Miss Cleo's hotline and Crossing Over with John Edward.
Some neat voice over to go along with the last shot, clearly Mark Addy (famously King Robert Baratheon in Game of Thrones).