I had a chance to read the Bizarro script a few weeks ago and regretted doing so...while the concept of a Bizarro film is interesting I just didn't like the way this was written nor it's attempts to refrain from using Superman (he appears as a dot or a streak in the sky and Clark is not around) Lois Lane though is a prominent character. Perry White and Jimmy Olsen are also in it.
I was reading the wikipedia article for Superman IV: The Quest for Peace and it stated that they actually filmed the Nuclear Man as Bizarro...I can't remember the reason why he was changed. There's even a picture on the article of Bizarro. I don't think it is there now. Just one of the many problems that the film suffered.