User blog comment:Emptylord/Blogs/Where's the lore going?/@comment-4057638-20130807193423/@comment-3974211-20130807203415

Jayce versus Viktor would probably suit as alternate themes for the "Invasion" map I mentioned below. It's PVM (a team of players versus hordes of minions) and the objective is to either last as long as possible, or possibly have a very end-game "You survived all 50 waves, you win).

It's already been proposed to have "versus the Void" and "versus the Shadow Isles", you could also have "versus the Evolution (Jayce's team)" and "versus the Resistance (Viktor's team)". Each option would affect the cosmetic appearance of the map (and perhaps even the announcer). You obviously wouldn't need Viktor on your team, it's merely cosmetic/theme of the enemies.

These conflicts are between sides, not individual champions, and it would make more sense to have a specific game mode where players can work together to prove whether or not they are strong enough to defeat Viktor/Jayce's army.