Help me understand why you think this is good news. Were you somehow harmed by Nokta?
Do you have personal knowledge - actual knowledge, not just a presumption based on bias - of Nokta stealing intellectual property? If so, can you describe in detail the intellectual property supposedly stolen?
Minelab has a bit of history with this sort of thing. They threatened to sue Whites - unfortunately Whites capitulated and agreed to pay Minelab. Minelab sued XP and lost. I think I recall reading (somewhere) that Minelab sued First Texas and lost (not positive about that, and I'm too lazy to look it up).
Minelab has a boatload of money. They can afford to use legal threats as a means of bludgeoning the competition into capitulation - knowing that even a loss on their part forces the competition to spend more limited resources defending themselves.
Protecting intellectual property is one thing. If... and I'd bet that is a very big IF - Nokta actually did infringe on Minelab's intellectual property, then Minelab should take steps to protect their property. That said, it would be unreasonable to think Nokta doesn't have a legal team that fully examined all of Minelab's patents before they started working on the Legend (or any other model). Unless Nokta's legal team is/was utterly incompetent, it is highly unlikely that Nokta infringed upon Minelab's patents.
If this lawsuit is - as I suspect, it to be - a bullying maneuver on the part of Minelab, then we in the relatively small metal detecting community stand to lose a lot if Minelab's attempts to bully bear fruit. Celebrating that is either short-sighted or outright foolish.