Gaming: Heroclix - Superman

Four more unique Legionnaires have been spoiled since the initial three, one of them with two slightly different figures.

Princess Projectra as Sensor Girl

Starman

Invisible Kid & Star Boy

Earth Man

That makes the count 8 total figures, 7 unique Legionnaires in all. There are still a few unspoiled figures, so there is a possibility of 1-2 more.