No Luthor?

I think we may have seen him in that underwater maximum prison vault with Superman's other captives, or at least some random bald guy with no lines. Would have been interesting to see him try to take down Superman and team up with the heroes, kind of like in the awesome video game. Also, wouldn't it have made more sense if he was the one who created Amazo and not Ra's Al Ghul? Oh well, whatever. I still thought this was pretty decent, despite not really living up to its source material.