I agree with Dutch on this. I highly doubt that any of this will ever come true, especially with MNR coming soon to Penn, I would think that MNR would be much more valuable and obviously much easier to accomplish. There still is a purpose for CSX to operate over Hell Gate, and unless that tunnel from NJ to Brooklyn ever gets built to allow better freight access to LI, I don't see the CSX operations coming to an end anytime soon. Very curious to know if there was ever any consideration to extend the N line north from Astoria into the Bronx? Such a thing wouldn't require any unique design of a bridge other than height wise, which can be of similar design to how they built Miami's Metrorail over the Miami river in Downtown. with a few turns join the same Amtrak NEC line and head NE. The amount of money needed to just upgrade the Hell Gate to accommodate a subway line will be costly and may only be marginally cheaper than building a new line over the East River.