Well if it ever became feasible, here's a proposal for a train NYP to LAX. It's basically the old Broadway Limited (routed through Michigan, as All Aboard Ohio proposed) and the old Desert Wind (http://www.timetable...1030n&item=0032) combined.
The gaps in Chicago were chosen to provide "reasonable" times for the western cities (LAX eastbound had to be in the graveyard shift but not that bad). If the travel time between LAX and CHI on the DW route is longer it would help with the eastbound (could leave LAX before midnight) but would screw the westbound schedule to arrive in LAX after midnight. Outside of that, the train seems to put the least populous areas in the graveyard shift (eastbound LAX/Las Vegas is almost overnight). Unfortunately Grand Junction, CO would be late night (11:55pm east and 1:35am west). When I took the CZ I remember the store there. I highly doubt they will be open for this train.
The train wouldn't be competitive for NYP-LAX vs. LSL/SWC because of the detour to serve DEN/SLC. But SLC and Omaha/Lincoln (along with CLE) are outside the graveyard shift. The train would serve as a second train between NYP and DEN and the schedule is pretty competitive compared to LSL/CZ. Plus, you get Vegas service back.
The old transcontinental SL was 3066 miles between LAX-MIA (http://www.timetable...1030n&item=0030) and this train checks in at 3318 miles, longer than any Amtrak train. It looks like 7 Viewliner sets since the train should be able to be turned around in NYP.
If the three day schedule is unrealistic, maybe just the NYP-DEN train would be. It would be about the same as most of the western trains and provide a second train between CHI-DEN which I believe Nathaniel has proposed before.
I am open to any other name suggestions if you're really bored today like I was.
Broadway Limited (CHI-Harrisburg, PA)
Three Rivers (Harrisburg, PA-CHI, Altoona, PA-CHI, PHL-CHI)
Capitol Limited (CHI-WAS)
Lake Short Limited (NYP-CHI)
Silver Meteor (PHL-ORL)
Southwest Chief (CHI-LAX)
California Zephyr (CHI-SLC, SLC-EMY)
City of New Orleans and/or Illini (CHI-Champaign, IL)
All I want for Amtrak is a direct train from Philly to Chicago in less than 24 hours