I'm excited to see people talking about Guardians. Remember that Rising Tides expansion was released all at once, where Targon had 3 distinct launch moments to pair cosmetic content with. Looking back I think we over did it a bit with 4 new base Targon guardians, so we'll mix things up a bit more during the whole length of the Shurima seasons and try some new, more unusual, ideas. Equal count by regions isn't the goal though, but to have a variety of Guardians people find cool and desirable.
Our focus testing on Boxtopus shows you are in a very small group of fans there, but you did guess one Guardian correctly that will come out before the end of this year. :)