Why release Championship Thresh, TPA skins, and SKT1 skins, but not Championship RIven? Thresh and Riven were received the same way, purchasing the skin during Worlds season, yet you don't bring back the Riven skin? If the reasoning it is a reminder of S3 worlds, then explain TPA.
Championship Riven was sold as limited edition, and that's why she hasn't return as of right now.
You can refer to this post for more information about limited edition, and the possibility of them returning : http://na.leagueoflegends.com/en/news/store/sales/plan-vintage-limited-edition-skins
Personalty, like many others, i would like to see her come back and receive the same treatment as other limited skin that were avaialable in the store (basicly you needed to play the game/had money at the time they were sold to have them). I would even suggest something like a championship bundle with this year championship skin, and even toss in primetime draven since they all share the championship/esport theme.
