
But this is a statement of a different order from that which claims that the New Testament itself is, traditio-historically, the final stage of an evolving Heilsgeschichte, in which what the Old Testament started is now brought to conclusion (the position, I believe of theologians such as Gese and Stuhlmacher, who I posted on here). This is to misconstrue the theological function of a canon of scripture within the community of faith. Here are Childs' thoughts on the issue:
The New Testament has its own distinctive tradition-historical development with its own peculiar dynamic and its wide range of diversity. It is not simply a continuation of traditional trajectories from the Old Testament. Indeed a serious confusion of categories results when the canonical unity of the two testaments represented by the Christian Bible is translated into merely historical categories as if the Old Testament flowed by inexorable laws into the New Testament. Rather the New Testament has its discrete historical context, its traditions were treasured by different tradents, and its central force stems from another direction than that of the Old Testament. Thus the New Testament is not a midrash on the Old, nor is it simply the last chapter of a story. Even the term 'Heilsgeschichte' calls for careful nuancing since it represents a theological judgement respecting continuity and is not simply a claim for empirical historical judgement (Biblical Theology, 212).
Though I'm sure N.T. Wright would make this kind of distinction (I don't remeber him doing so, but then I've only read his historical-critical work, which - I hasten to add - doesn't automatically translate into biblical theology), a get the feeling that a lot of his fans don't, especially emergent types for whom "story" has become the central theological category, at the expense of other biblical forms such as psalmody, law, and wisdom (e.g. listen to Brian McClaren's sermon: "Which story do you live in?")
It is considerations like this that led me to call my blog "Narrative and Ontology." (See the most fascinating chapter of Childs' Biblical Theology, "From Witness to Subject Matter.")
Update: The blog Theological Ramblings of an Anglican Ordinand provides us with some useful N.T. Wright quotes showing us the nuance in Wright's approach:
Worldviews may be studied in terms of four features: characteristic stories, fundamental symbols; habitual praxis; and a set of questions and answers.
In other words, narrative is one element in a more complex whole.
And while we're on the topic of Tom Wright, Richard links to a sermon of his on Ps 98 (scroll to the bottom of the page).