While some may not like it – particularly in the West and Midwest – the smallness of the New England states is what gives them substantial added power out of proportion to their size, which they would be loath to relinquish.
While representation in the House of Representatives is based primarily upon population (not entirely, since each State is guaranteed at least two Representatives regardless of its population), representation in the Senate is “two Senators per State”, regardless of size.
So the six New England states account for 12% of the Senate presence. Combining the states into one super-State, even if it had proportional population and size to, say, California, would weaken the states in the Senate, even as it made New England a fatter plum in terms of the Electoral College every four years when we elect a President.
Obviously, fantasy players can game any scenario that they want, but this is not going to happen in a future that any reasonable person could foresee.