Look at it this way, years back HG dabbled animation, Robotech, Captain Harlock, the first attempt to dub Dragonball, Lensman, and a few others and even did a few movies. Shaka Zulu comes to mind. Then they let that aspect of there portfolio die off other than holding onto rights and creating lawsuits and headaches for people and focused on their California Real Estate interests. They did nothing to promote anything they did animation wise for years until the advent of the DVD and putting out Robotech, and I am pretty certain someone came to them to do Robotech and not the other way around. At the same time Animeigo put out Macross on DVD and it sold. To me it appears people have to go to them to have them do anything with the property.
Now Topps I think probably has a case of benign neglect for Battletech. They licensed the rights to Catalyst and as long as it makes money there happy, were happy, and all is right with the world.