Could Sony licence the rights for The Robotech Macross Movie 2: The Invid Strikes Back direct from Tatsunoko after 2021?
Why? Nobody cares about the Invid. The thing is, if they're going to do hat, why not wait until the rights revert and then, license an honest to god Macross movie. It's not like they don't have lots of room for stories in it.
Robotech is narrative, tiny. sure you have them talking about galaxies and such, but the only things that count in the show are the MC's and very small battles. MAcross? Between colonization fleets and offworld colonies, you can pretty much have full movie adventures, even if the "main characters" never make an appearance, IE, the reason we'v enever seen Rick at all since the origional series.
Also, if you license it from the people who owned the rigbhts, you eliminate any of the possible problems with Robotech IP.
Lastly, a Macross movie has the advantage that you're not using a word "robotech" that is cordially hated by many fans due to HG's actions. Seriously, why make a movie that a number of people will loudly hate? Especially since everyone else will be going: What? What is robotech?
Trnasformers is often mentioned when talk of a robotech movie comes about, but the thing is, Transformers is a living franchise that had pretty much continuious activity from the 1980s until the movies. Robotech is nearly unknown beyond a relatively small group, many of whom only know it because it's the property that keeps them from buying Macross stuff.