Interesting. 

Just as a counterpoint: the two other gangs we haven’t seen yet in Republic City are the Red Monsoons and the Agni Kais. That sounds like one water bending gang and one fire bending gang to me. 

Also the Triple Threats are likely named because they have thugs that bend all 3 elements. 

I guess Earthbenders make good armies and everyone else makes good gangs? 

-Da7e-