but, BR is more suitable to join OW rather than *A, as:
1.its frequent flyer structure is much more similar to the standard of Oneworld, dividing into OW Ruby,Sapphire and Emerald is easier.
2.BR has codeshares with AA, QF.
3.BR can bring a new destination for Oneworld -Macau (MFM)
4.BR can assist BA to launch LHR-TPE route via codesharing, also providing a extra point for Kangaroo Route.