Interesting...??? So if a proposed Nashville to Memphis was added to the Nashville to Atlanta line with the addition of a Memphis to Little Rock, then the Texas Eagle could branch off into a A or B line in Little Rock. Somewhat like the Empire Builder splits. that would break the 750 mile threashold.New Orleans to Mobile is the only part that is under consideration for service commencement. It is way under the 750 mile threshold hence it is not part of the federal funded service.
As a matter of fact New Orleans to Jacksonville is also under 750 miles and hence has to be locally funded if and when it comes up for service revival. There is a possibility that it would be handled as an extension of the City of New Orleans thus making it more than 750 miles and hence part of the national network, if and when it happens and if enough equipment is available.