Wait a minute.
First of all, "ripping off" is a harsh word which is in 90% probability not true.
And no, apart from some tributes Nolan made to Burton (and Schumacher I believe), the suit thing was not a ripoff.
Second, the Elfman theme (beautiful, iconic etc indeed) represents and enhances a certain atmosphere perfectly. That atmosphere is the one that Burton has created. The Nolan atmosphere is completely different and if you've heard Elfman music over BB and thought it fitted, than I can't say any more on the subject. But, for me, it is totally inappropriate for this franchise.
3rd, Williams is still Superman just because of the course Singer decided to go. Even in the beginning, Ottman announced he wouldn't be keeping the theme at all. Other themes have been done and, while not as iconic as Williams, doesnt mean they aren't valid (Lois and Clark) or noteworthy enough (Superman TAS). Personally, I'd have absolutely no problem with a new theme for Superman Returns.
People need to let go of the past and be brave and open-minded enough for something new.