Forgot to mention that OZ has codesharing aggrements with NH.
I really don't know what they are trying to do, they seem to have ties with both Star and OW airlines (although admittedly, their OW links are somewhat more significant than the Star ones)
But regardless of whether they join OW or Star, they are sure to do better in terms of alliances than KE, who are locked into Skyteam. Anyone ever looked at their network coverage?