As of the last two years, and I am pretty sure we can find more occurrences in the past. Riot has either hard buffed a champ for the worlds or released one corresponding to the singer, why this theory of mine ?

Well firstly we have ksante advertised as the first gay black champion (even tho rell existed), because of lil nas x. And now we have jinx buffed, some may say that new jeans might have been playing league for a long time. BUT look at it this way jinx is main character of arcane, arcane brought light to the regular not gamer public to league. So that I think new jeans learned about them, more, from jinx and then boom new jeans announced and jinx omega buffed, we could argue that those champs are always not buffed or disabled for worlds patch but still. One more argument last patch starts with "New patch, NewJeans, new changes".

I know this theory is shitty but I thought about it so might as well share