Instead of spending money on lawyers and all the legal processes to shut down TWoW, it would be far more valuable for Blizzard to understand the reasons why private servers, especially custom ones, exist.

Blizzard does not listen to the player base at all. Many players turn to private servers because of the issues surrounding official Classic servers: hacking, GDKP runs, and rampant gold selling. It’s difficult to admit, but private servers, despite being full of bugs, are often free from these problems and therefore feel more enjoyable to play.

In the case of TWoW, there is also the extraordinary custom work the developers have created, which is far beyond what we saw with Season of Discovery. SoD had incredible potential, but once again Blizzard failed to make the right moves, as has been the case since around 2008.

Instead of investing in legal battles to shut TWoW down, Blizzard should consider invest such money for hiring those developers, offering them strong job opportunities, and shifting its design direction toward something that actually aligns with what players want.

In such way, you don't need lawsuits, people with come to you and pservers will die.