Rift Rival Game Mode

I think a super cool random game mode would be what I would call Rift Rivals in honor of this new tournament.

5v5 on Summoners Rift Each team member would vote on which region they would like to play as (ex. Noxus, Demacia, Ionia, etc..) Using the same pick system as One for All. Then each team would see the region chosen by the other team and champs would be selected only from champs that are associated with the chosen region. A ban or two could be added depending on number of champs from each region.

I think a lore based game mode like this would be fun to play but it might need another niche. What do you guys think of the idea of a lore based random game mode like this? Any idea on what could make it a little more spicy?

I am unsure if this is the right area for this post. Sorry if it isn't.