Michael writes...

Dear Mr. Greg "greatestanimatedshowrunnerofalltime" Weisman,
While of course Lex is a member of the Light, as well as other villains I'm sure many comic book readers are aware of, like the Brain, possibly, but while their inevitable reveal will be a shock to the characters and possibly the viewers, most of them, who presumably don't read comics and have little to no comic book knowledge will have no clue who these villains are, as they haven't appeared in the show yet. Revealing a shadowy villain to be a villain no one's seen before will feel cheap to most viewers.
All the best and keep up the good work!