The list of products for the Pathfinder Adventure Path subscription ends with the following three products:
late January Pathfinder Adventure Path: Rise of New Thassilon (Return of the Runelords 6 of 6)
late March Pathfinder Adventure Path: Eulogy for Roslar’s Coffer (Tyrant’s Grasp 2 of 6)
mid-April Pathfinder Adventure Path: Last Watch (The Tyrant’s Grasp 3 of 6)
What happened to volume 1 of Tyrant's Grasp, presumably to be released in February? As best I can tell, none of us outsiders have seen that page.