About the "What Could Have Been" tidbit concerning the original plan to have Hank Henshaw become bad and not turn out to be J'onn J'onzz in disguise: considering how David Harewood (the actor who plays J'onn) felt about playing Henshaw in the pilot episode and how he felt when he learned that now he was going to play J'onn, and considering how I feel about Henshaw turning out to be J'onn in disguise (I love it), I think the change was for the best.
About the "What Could Have Been" tidbit concerning the original plan to have Hank Henshaw become bad and not turn out to be J'onn J'onzz in disguise: considering how David Harewood (the actor who plays J'onn) felt about playing Henshaw in the pilot episode and how he felt when he learned that now he was going to play J'onn, and considering how I feel about Henshaw turning out to be J'onn in disguise (I love it), I think the change was for the best.