The Gospel according to Luke according to Marcion

I enjoyed Judith Lieu's review of Dieter Roth's The Text of Marcion's Gospel (Brill, 2015) for Marginalia. What interest me most is how recent studies of Marcion's text seem to be suggesting that maybe we should stop thinking of it as Luke's Gospel redacted, but just another version of Luke's Gospel, maybe one composed even earlier than the version available to us now. The most intriguing aspect of this discussion is the absence of Luke 1-2 from Marcion's text. As Lieu observes:

suppose, however, that rather than being a corrupt version of (canonical) Luke, Marcion’s Gospel was in fact an earlier precursor to it, perhaps producing the corollary that canonical Luke was to some extent a corrective to it. An example for this might be the birth narratives (Luke 1-2), which Irenaeus already accuses Marcion of excising, presumably because they contradicted his conviction that Jesus was sent from God without undergoing normal birth and therefore being possessed of a flesh different from that other mortals share. Yet students of the New Testament have long recognized the distinctive style of Luke 1-2, and the fact that there are few explicit continuities with the chapters that follow: might these chapters have been added subsequently, precisely to counter any views, such as those of Marcion, that questioned the full humanity of Jesus?

This has implications for the study of the Synoptic Problem, the general composition of early Gospels, etc. I have a hunch that this discussion could result in many other areas of related exploration in the near future.