What ever happened to the zed vi garen sona thing

It was titled 'Mind of the Virtuoso' and only represents his thoughts.

Those are some people that he has plans for, that he feels especially inspired to kill in these particular ways, but he hasn't actually been able to do it yet.

I am assuming the point is to give people an idea of what Jhin considers beautiful and an up close look at how his artistic vision works out from his eyes.

"I made them Beautiful"

It was Jhin's fantasy of what it'll be like when he kills them.

http://www.surrenderat20.net/2016/02/red-post-collection-jhin-q-status-of.html

Riot clears up some misconceptions about Jhin in this article.