Will Riot Ever Return To C2E2?

C2E2 is basically the only large-scale comic and entertainment convention here in the Midwest (US), and it is somewhat weird that we haven't seen any Riot presence there since 2014. The event is only getting more and more traction (especially after this year), and the last time, the Riot Games booth was the #1 place to be.

I believe I can speak for most Chicago summoners when I say that the crew from Riot has been greatly missed these last few years. Is there any particular reason for the absence?