i hate to say it, but it was suspicious that garen and darius were among the strongest champions during the versus event, because the meta happened to favour them like crazy back then.
not because of their own strength but the other champions that were popular at the time were easily countered by both of them.
it seems to go further than just direct buffs. i think they know how to manipulate the game a few month in advance of a major skin release to slip certain champions into the meta right when they drop the skins.
maybe this is paranoid, but there have been a whole lot of coincidences like this, and they tend to be nerfed a few weeks later when the initial sales slow down.
maybe im overthinking this, because in hindsight the odyssee event was a much bigger deal with more skins involved and those champions werent meta at the time.
it still feels weird how often skin releases and specific champions being strong or buffed at the same time line up that well.