They will have to get the sub out of the river before they scrap it, as the DEP and EPA have nixed cutting it up IN the river. Yet, if they get it out, they'll have to transport it somewhere else as I doubt the developer who has evicted the museum wants this environmental hazard cut up on his property.
So if you're going to lift it out and then move it anyway, why not save it? Waiting to see how this goes.
Of course, if a channel could be cut deep enough, maybe they could fill it full of ping-pong balls to "float" it out.