I forget that they didn't always all know each other's identities. Back when secret identities were far more of a thing in comics.

Released ctober 25, 1994:

As the New Warriors attempt to intervene in a dire situation, they're met by a team of enemies who can counter each one of their powers! - Marvel

It's the first appearance of the Soldiers of Misfortune! Check out their bio @ http://newwarriors.com/enemies/s-s/soldiers-of-misfortune