De Blasio responded after parade-goers reportedly chanted against the development Sunday.
Community Board 9 voted Tuesday night to send a key document on rezoning back to committee.
State Sen. Velmanette Montgomery said, "white people don't eat the way we do," about the closing.
Cuomo reiterated Monday that the MTA did not see any "redevelopment possibilities" at the 200-acre site.
While experts say it can be done, they predict the development will be expensive and take years to plan.
Development group Brookland Capital bought the empty Prospect-Lefferts Gardens lot last week.
More than 30 percent of units at 51 Jay St., a former silverware company, were sold within 30 days.
Slate Property Group wants to demolish the Key Food on Lafayette Avenue in Clinton Hill.
Apartments, schools, retail space and a waterfront park are in the works for the Village.
Alicia Boyd of Movement to Protect the People was given a summons for disorderly conduct, police said.
A nonprofit worked with architects and community members to study ways of improving the esplanade.
A plan to build 11,250 affordable units at the site must address infrastructure, local leaders say.
The building is proposed for an empty lot next to the "Great Wall of Brooklyn" mural in Fort Greene.
Greystone will bring two side-by-side residential developments to Fourth Avenue and President Street.
The council added a block of West 15th Street to a special zoning district.
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