I'd also be 100% down for Idaho to Texas. Mostly because the start would be only ten hours due south, not several days like any of the others. (The drive back would be longer, sure, but the homeward leg is always quicker.) Going through the mountains in winter would be beautiful.
But the rumour mill at barber was suggestive that they would stick with a more East Coast winter and West Coast summer route, with the east one being associated with a south-east race, much like the west-coast is associated with the Concours d'Lemons. It was also suggested that there are many Moscows in the north-east/ eastern mid-west, and several Parises in the south-east. The idea would be to keep things more accessible to everyone. And this is something I've become more acutely aware of having recently moved about 1000 miles west from my former location smack dab in the middle of the continent, where just about everywhere was within 30 hours of driving. It adds an entire day onto the trip to anywhere east, and because of the awkwardness of north-south routes along the continental divide, didn't actually knock all that much time off the trip to Monterey, largely due to the fact my drive started by heading east...