And, in the tradition of other Harmony Gold appropriated "Robotech" series, wasn't the Movie just a re-edited version of "Megazone 23", a standalone 80's anime that had absolutely nothing to do with the Macross SDF-1?
As for this new movie, HG's had to improvise its own MUC for twenty years now, and this also sounds like a generic standalone story.
Funny thing is you can blame the japan studio for that! Robotech the movie was dubbed to take place during macross with a new ending by the megazone animation team with no tv show footage and the japan studio was planning to release macross do you remember love and didn't want two macross films near each other and asked them to change it to southern cross! They did and used southern cross footage to fill in the gaps!
So in this case it's ironic not hg fault this time!
For fun here is the future is now in the film. (80s cheese at it's best.)