When the economy improves will Delta consider expanding into Sydney or Auckland? Delta does not have any service in that part of the world and to use there code-share partners would be a long trip.
I believe they would have a great feed into LAX. They can move passengers from JFK, CVG, PDX, ATL, DFW and SLC into LAX for a daily 777(if Delta 777's have the range) to either SYD or AKL. This would bring more competition for this route into that part of the world.