It was recently
announced that 9W was joining the Asia Miles program.
Whilst it's by no means the only non-OW carrier which is part of the scheme, its joining could be the precursor to applying for OW membership, especially now that AI is to join *A. Note that 9W is also a (non-status earning partner of the QF Frequent Flyer, AAdvantage, an Marco Polo programs.
Anyone with more than hearsay to add?