Game Mode?

I know you guys are currently working on the team builder, and I have bounced this idea around before but I still think it would be fun to have the option to set restrictions on what area your team is from. That way it would be possible to have a Demacia vs Zaun or Piltover vs Freljord, etc etc. Hoping the community gets into this and has fun with it but also maybe they could set up an in game event if entire teams are from the same region. Or maybe the minions look different, or something along those lines. Plz help with ideas and your thoughts.