Is it really no good reason? HG are not the ones who signed a binding agreement never to use the unseen designs again only to allow and conduct repeated attempts to sneak as similar designs as possible back into the franchise. HG are not the ones who won't let the unseen issue rest.
This argument is backwards.
FASA created the
Warhammer BattleMech, its name, backstory, configuration and game rules. The only thing not FASA for the
Warhammer is its visual representation. Over two decades of "unseen" have proven that BattleTech is its own artistic entity, and that it doesn't hinge on the imagery in question. (Using the
Warhammer here as a stand-in for all Unseen.)
What FASA, later FanPro and then IMR/CGL did was to try and fill the hole in BattleTech that Harmony Gold punched. They backfilled the hole with designs that, in my uninformed layman opinion, share no copyrightable similarities with the original IP.
...and even that's only relevant if and when Harmony Gold can prove that they have the rights in question. In the light of the often-cited Japanese court ruling from 2003 it is entirely thinkable that a US court will rule that HG either doesn't have these rights, or at least doesn't have the right to sue others for infringement. That, to me, is the vastly more interesting aspect of the new case.
We already lost mw5 over this, we could have lost the 25th anthology. Why do the various bt companies keep poking that bear? The unseen aren't worth the lawyer money.
You're lumping in the 'Mechs with their unseen artwork. The 'Mechs in question cannot and will not go away, as they are the bedrock of BattleTech. And that's why they need some form of visual representation.
After the 1996 settlement, that visual representation cannot be the original Japanese mecha. But sufficiently different mecha in the BattleTech style must, and - in my opinion - can be created and used for BattleTech. Harmony Gold at this point isn't protecting their own rights so much as they're trying to take the entire BattleTech universe hostage. And that's absolutely worth fighting over, especially when the court battle looks as if it could be won.
It's worth pointing out that HG are, at heart, a near-criminal organization that colluded with various other dubious entertainment companies to drive up the prices of liscensed TV and movies internationally during the 1970s (at least that's what the Italian investigations found). This isn't a legitimate business that's just made poor choices over the years, this is part of a scam by 1%ers to get even richer than they already were and they basically got away with it for almost forty years. Seeing the courts put the boots to them in a big way would be at least one thing I could point at and say "there is occasionally justice in this life."
They own certain IPs (or they don't - courts will have to decide that). The lawsuit is not a beauty contest, and if or to what extent anyone likes or dislikes either party is legally irrelevant. It's not the question the court will have to decide.
Does anyone else here remember the days when FASA was slammed as FA$A among roleplayers for their perceived crackdown on third parties who made (too) free use of FASA's BattleTech, Shadowrun and other IPs?
If Harmony Gold is in the right, then by all means, they are. My gut feeling says they aren't. But again, that's for the court to decide. Torches, pitchforks, tar & feathers have no place here.