They've literally never been able to, so I'm not sure why that would be phrased that way. Of course, a lot of people seem to have jumped to conclusions without thinking it through and concluded that this somehow means that Macross sequels containing characters or designs that were in the original series are somehow going to still be stonewalled. That's obviously not the case given that we already know that those shows have been licensed and Big West is literally showing episodes of Delta th