There are some interesting articles discussing the place of the Gospel of Luke in relation to John and the other gospels:
I would prefer to take more time to explore literary relationships before going too far with the assumptions in these for oral traditions.
When I get time to digest some of these more, I would like to compare them with other studies that place Acts very late, and our canonical form of Luke also late. By late I mean the latter half of the second century, from the time of, or even very soon after, Justin Martyr.
I have flirted from time to time with the works of Matson, Shellard, Lawrence Wills, Tyson, Pervo and others tend to think there are some neat political and doctrincal (catholicizing) reasons for placing our canonical Luke-Acts as the last composed of our NT gospels. Luke, I wonder, draws on Mark, Matthew, John, the Gospel of Peter and the Protoevengelium of James, and whatever was proto-Luke (probably a Marcionite gospel).
If Luke was the last and was consciously an attempt at unifying and catholicizing the gospels out there in the field, it would, I think, provide additional explanatory power to why he might have changed Matthew’s birth scene and the Sermon on the Mount. Those were very Mosaic, and Luke was looking very much for a Jerusalem and OT grounded religion, but Moses per se was too divisive. No time to discuss details now, but am tossing this in as a thought-reminder to come back to.
Acts, its companion, was modeled on the legend of the founding of Rome: the hero, like Aeneas, leaving Jerusalem and voyaging via Troy (and via many tribulations) to establish the new Jerusalem at Rome. I began this blog with a series of posts exploring the hints of this in Acts, but ran out of steam when I found myself unable to get ready access to all the sources (and time) I needed to complete the project. It was a theme that I had often wondered about, and then when I read Marianne Bonz’s Past As Legacy I decided to see if I could build on that to see if I could find a stronger case.
Will be on the road again next few days so don’t know how much will be able to do with blogging, let alone catch up reading. But by typing this post at least I’m creating a reminder for myself to come back to this when time permits.