I also remember you.. ahem.. predicting the last Tarzan movie would catapult that character's popularity over Superman. I can find it on here, don't tempt me.
the reason the Joker movie is doing better than "Man of Steel" is because, Man of Steel is not a good movie, Joker is.
also, any character has peaks and valleys, this version of Joker is being received well, Jared Leto ? not so much, Superman Chris Reeve, yes, Brandon Routh, not so much, Christian Bale Batman, yes, George Clooney Batman, not so much. same with Spider-man, Hulk, etc.
I'd like to also reiterate my offer from the last time you gave this "prediction". I will gladly trade grade for grade my blue label Batman #1 (no dot version) for a blue label Superman #1.
any takers??