Honestly, how could it ever be worse than Sargeras stabbing Azeroth? I mean that didn’t even alter the face of the world, it just let it sprinkle some juicy Azerite. I find it very hard to believe that Zovaal wants to make weapons and that’s his goal. For me that sounds incredibly silly, but maybe that’s why it’s likely.
Unless the weapon is something that completely changes reality (what kind of device or weapon could do that anyway?), I find it hard to believe. Or is Zovaal crafting his own Infinity Gauntlet? Anyway, I’m pretty sure it will be a major missstep for the Warcraft universe, but after Shadowlands this seems to be expected.