This post is just for those curious about the early history that led up to this situation. Those not interested in boring facts may want to tune out now...
Also, much of this info was originally posted at another forum. I really wish I had the name as I would like to credit him or her. Sorry.
I've filled in a few facts I found on my own.
In the mid-eigthies FASA had in fact licensed the "Unseen" designs from Japanese sources in parallel to Harmony Gold, so HG's first challenge to them went nowhere because at that point, FASA's claims looked legally valid. No, FASA's problem back then was with Lucasfilm. Long-time Battletech fans will remember that it was first called "Battledroids." (I've still got the original boxed set.) George Lucas (well, one of his flunkys) called up FASA and said: "Nuh,uh. WE own the word "droid". El ceaso and desisto." So the name was hastily changed to BattleTECH. Which was just as well. I mean, seriously, who wants to be know as a "Droidwarrior"?
Anyway, a few years later FASA's middleman company on the deal, Twentieth Century Imports a.k.a. TCI (importers of nearly two dozen 1/144th scale models of the mechas from "Crusher Joe", "Macross" and "Dougram") went out of business and that broke the paper trail. This was just before the time FASA began to bring the Clans into the game. The issue was basically dropped by both sides (with FASA dropping the Unseen from its products in a quiet fashion and HG moving on to other projects) until the Battletech TV series came along and there was a parallel revival of Robotech because of a product tie-in to the Exo-Squad TV series. (Also, anyone remembr the "1st Somerset Strikers"?) So, Playmates (on HG's side) sued Tyco (on FASA's) and won, and FASA crumbled soon after that.
In theory, Studio Nue and Sotsu Agency (the original designers of the Unseen) hold all the copy and patent rights on the Unseen. But their rights in the United States are partly held by HG due to a resolution in Japan between the two creative entities behind Macross (Big West and Tatsunoko).
Should anyone think I'm making this up, just take a gander at any of the original TCI models and you will see right on the assembly sheets "Licensed by Tatsunoko Productions of Japan, exclusively manufactured for TCI."
By now, some of you may have your eyes crossed. See, this is how I.P. and trademark rights can get so... interesting.
EDIT: About the "Warhammer" from the new Mechwarrior video. Yeah, it is "different" but very, very close to the original design. I highly doubt it would pass the rule of thumb (in legal circles) that it must be different by at least 34% to be considered "orignal."
What bothers me about this is that Jordan Weisman MUST know all of the above facts. He was one of the primary people (along with Sam Lewis) behind Battletech. Certainly he must have realized the released video would trigger a response from Harmony Gold. Was he doing it deliberatly to test them? Maybe to get their attention, THEN begin making offers? I'm really curious.