Indeed! Scary-smart plus evil is a baaaad combo. Of course, I had to make Brainiac Six a villain, as DC Comics canon has already established that he will be. 
(The creator of the android Indigo, who was responsible for killing Omen / Donna Troy, was Brainiac Six..)
Plan for this weekend is to have the first “Legion Tryouts” session. I am pondering candidates…
So we had the first try-outs, with 16 Legion applicants. Some were silly, some were useless, and a few were good. My players contributed a few of the ideas, and the rest were mine. My favorite player contribution : Pinball Paul, who is basically Stone Boy and Bouncing Boy’s spiritual descendant - he can turn himself into a metal sphere.