One of ideas for rebuild the Zero area of WTC was a very old project: the Antoni Gaudi Skyscraper. Really this is not a real project, because Gaudi only makes three or four sketches of this building and never work seriusly: the 3d images you can see in some websites are modern versions, and most of details are extrapolations of other Gaudi projects, mainly the Sagrada Familia of Barcelona; thus, I need to make my own version without accurate blueprints.
Personally I think the effect of this rocket structure in the Skyline is very deffective: simply the idea don't work.