If SSFL ever expands, I doubt they'd go in and replace the splash pad. I'm almost wondering about the future of Moulin Rouge and the VIP dining, because if nothing else, I can see them doing a proper sit down to Illumination of some kind.
That'd then allow them to have Parisian/Mels/Theater Cafe to be saved for another larger project down the line, to round up the land as a whole.