You can read a description of this work here.
What's more, Carmen Imes, a student of Block's, states that more could be in the works:
Meanwhile, the longer 3-volume (1800-page!) version of Block’s Deuteronomy commentary is under consideration by two publishers. If this one goes to press, it will hopefully include all of Block’s Hebrew diagrams for the entire book, making it an excellent set for teaching exegesis courses.