Not really. There are two "journeys" outlined in the book, one light, one dark. He used one for the OT, the other for the PT. Other aspects of Campbell's interpretation of myth factored into the Ewoks animated and live action tv shows, Willow, and The Clone Wars. But Lucas seems to have moved on to other sources. There's a lot of paganism in his post RotJ fantasy, I think he must have gotten into Robert Graves (The White Goddess) at some point. He also frequently uses the Stith-Thompson "Index of Motifs in Folk Literature". Shakespeare seems to have greatly influenced the PT as well. Expect a melting-pot of influences. But I expect that, given the enduring success of the OT, Arndt and the director will try to adhere to the same structure as ANH.