I would think that would extremely unlikely, for numerous reasons.....not the least of which is that I believe there was a covenant placed on the land at the time of donation: should it ever not be used as a park, it would revert back to the family.
This is also the case with the former Planetarium: now that it relocated/expanded to downtown, the 'old' one cannot be turned into anything other than a museum....so it just sits there decaying. Makes me want to vomit each time I drive by there: I can still remember very well the thrill of going there as a kid when it was brand new, not only for the star show and exhibits, but I thought that building was the coolest thing ever. Still do, in fact.