1v1v1 or 2v2v2 (duo) could be very interesting. Dealing with the aspect of not looking attractive to fight on top of everything else could be a unique experience. Some examples:
"Ok the Riven is committing really hard to killing me i need to control the situation so that Zyra will backstab her and then i can kill Zyra"
"I need to play defensively until the other 2 start fighting and then i can melt them with aoe"
Etc etc
Kinjishi3 votes"1v1v1 or 2v2v2 (duo) could be very interesting. " 3v3v3 could be done as well. It doesn't go above the 10 players per map we have right now. Probably a tanky support, jungle, and adc (depending on how the map would be).
Edit: TT kind of already has this setup provided if the Vilemaw cave/pit/alcove/whatever is carved out more and made into a third nexus point and base (though Vilemaw would have to be removed or placed somewhere else).
Spacesuit Spiff1 votesSo long as they queue together. The main problem is that 3 teams takes a whole new level of coordination since you have to manage the power balance instead of just crushing one enemy