In June 2017, a California court upheld a license agreement between Harmony Gold U.S.A. Inc. and Tatsunoko Production, affirming that Harmony Gold’s license to The Super Dimension Fortress Macross, The Super Dimension Cavalry Southern Cross, and Genesis Climber Mospeada will expire on March 14, 2021.
Harmony Gold can continue to make derivative works, including live-action adaptations, of all three titles until the license expires. All licenses and sub-licenses will revert back to Tatsunoko at that time unless both parties extend the agreement. Harmony Gold owns the title Robotech in perpetuity, but when its license expires it will no longer be able to use or exploit works that are derivative of the three anime titles.
There’s a lot of background on this case, which you can find at Anime News Network’s article about it. The link to that story is included below, for those who would like to know more information about this ruling.