There has only been one edit on the wikia since Sannse's rollback (I heard about DC's nuke script, don't do it, they will eventually start banning/desysopping if this goes on and potentially put it for adoption), it doesn't really take much effort to kill it off. Just keep your eye on it and slow down any community growth, people will wisen up and move over. Doing something that causes Wikia to put it up for adoption is a recipe for a potential disaster.
@FM, that was always the approach, and there has been negotiations multiple times already, because KHWiki abandoned the wikian community, so they always strayed from the intended path. I often talked about this with DEXIII when he was in charge of Wikia site, and back then, the community absolutely hated KHWiki.
Basically, it's easy to fork over a small wiki, like KHUXWiki. A larger wiki takes much more work and effort because you have a big community to manage as well. With a big site, you can't just say "Okay, we are moving now, whoever wants to stay, good luck have fun", because Wikia is a titan and will always win search rankings as long as there is a competing community.