(2010)
To mark DC’s 75th year in 2010, HeroClix released this expansion set filled to the brim with classic and current characters from throughout the ages. You might think this would allow for several Legion characters to be included, but not so .. only a couple of different caste Dominators and Superboy are included, the latter making it only because of the Legion affiliation mentioned on his card.

003: Dominator; 019: Ruling class Dominator

026: Superboy (card mentions the Legion)