Oh god. How did I know the king of "no one can say anything bad about SR or Singer, and I am going to post replies to any poster who does" would reply. There is an interview that was on TV with Spacey before he was cast, but after it was announced that Brandon was the new director. I believe it was entertainment tonight, but it might have been access hollywood. And in it he said "He was going around on the Usual Suspects set telling everyone his idea for a sequel to Superman 2. So I am glad to see he is finally getting his chance to do it" They also asked Spacey if he was going to play Lex Luthor, and he said that he didn't know. They have talked about him being in it, but he wasn't sure he could do it with his schedule at the time. I don't know if the video is online, but it was on the TV right after he was signed on by Warners. I think it was on Access Hollywood or Entertainment Tonight. And from that, pretty much everyone can guess his idea was Superman and Lois having a kid as they had unprotected sex in S2. And, since at the end of the movie, he gives her the kiss of forgetfullness, well you can guess it from there. But I am almost 100 percent certain his big idea was Supes and Lois having a kid and Spacey did say "sequel to Superman 2". I don't have a link to it as I don't know if it is online but I do know what I saw on the TV.
Thanks for the Wikepedia link. I am going to let Red reply to you:
It was also why when rumors came about about Lois having a kid, even though I didn't say anthing, I knew the kids was going to end up being his. Becaue Singer wanted to make a sequel to Superman 2 all along. He, or one of the whack pack had even said this would be the new Superman 3.