Tbh if they want MTA investment they’re going to need to have their public transit supports make some massive noise, because rn the MTA and the politicians see Nimbys. Also there are a few key issues with this that need to be kept in mind:

• The Staten Island railway is sorta doing its own thing so integration would expensive
• The Verrazzano Bridge is not suitable for rail in general
• Making a new bridge would be incredibly expensive
• Making a tunnel would be even more expensive
• Making a tunnel directly to Manhattan would be absolutely expensive
• The subway service that serves that part of Brooklyn seems a bit overextended already