True Duo Game Mode

What do you all think? A game mode with teams of two (not sure how many teams). I think it would be awesome to be able to have a true "duo". Could be a cool new rotating game mode where you and your partner take on other "duos". Maybe to take down a nexus, or hold a location, or reach a number of kills.

Polls aren't working so I will just ask, how many teams? Two, Three, Four, or Five? 2v2, 2v2v2, 2v2v2v2, 2v2v2v2v2