Perhaps it's not the actual consideration of the MNR contract - IE money for moving our trains - but rather the terms that CT wants to reexamine. The terms are the "devil is in the details" part of a contract. For example: You buy a car for $24,000. OK. Do you pay all up front, monthly, per mile, at the end when you give it back... What are the interest rates, is there a mileage cap, are there licensing and insurance requirements, is there a time limit, is there a day/date/month you can/cannot use the car, what kind of warranties are available, where are disputes settled and under what state's laws... The list can go on and on.
I don't think anybody really expects CT to start their own railroad, but they may be very interested in changing some terms of the contract to ensure delivery makes the passengers happier than they are today.
Amtrak is proud to announce a new train to Florida that doesn't stink: The Floaterian. An all-star just like Babe Ruth.