And what are your sources? rumors ?
Robotech is over ? it's a fantasy of Macross Hardcore Fans... Do you really think that Robotech fans will love more Macross if HG lose the rights? Robotech is not only the heritage of the "saga macross", even if Big West recovers rights in some countries, there will always be Robotech AND Macross. These are two different way since a long time ... and we must not forget that HG will probably never lose the rights in the USA.
However, be patient, with BW rights, Australia will have all Macross series in english langage soon :-)..