Of course in this discussion we also have the Texas project. Having selected Dallas as one end of the service, Texas Central Railway is working with Japanese firms to make a service from Dallas to Houston. Only 240 miles, but they plan over 60 trains a day and they only have three stops stations. Like most High Speed projects they look towards 2020 to be completing the segment.
In all this there is the South Central High-Speed corridor which is a Federally Designated High Speed rail are from San Antonio to Dallas, to Oklahoma City and then Tulsa. A branch goes from Dallas through Texarkana to Little-Rock. All well and good, but I would like a branch leading through Shreveport down to Alexandria and then maybe New Orleans. To me the Texas projects have the best chance to build something since there is still lots of open land between cities. XpressWest might have the next biggest since most of its route is desert. Only time will now tell.