They should partner up with a western entertainment company, for example XIX Entertainment. They are the ones managing Now United. Then you will have a true global group. Not how Korea is doing it with favouring only korean members as the majority and spotlight.
they should build a group with having at least 4-5 members with Asian roots which grew in western countries like UK, Germany, France, Canada, USA, etc.
imo its just a matter of time until another BTS or Bp gets even more huge internationally, partnering with a western company might speed up things a little, but I think it will already happen organically.