Chrysler....they don't have any new real products on the horizon at this moment, their interior quality is terrible, and they don't have any foreign market products/brands they can rely on.
Ford has Ford Europe which seems to be doing well and is in good shape making some cool cars that they could bring over if they put their minds to it. They have a new set of engines arriving very shortly that could be promising. If they put those two together I think they will be in good shape. New global Focus, the Fiesta, and some sort of F-150 rejuvenation (which still sells somewhat well), and some sort of Fusion/Mondeo bread and butter midsize and they could be doing alright.
GM has potential as well...they need to ditch about half of their brands, combine a few, and keep doing what they have been for the last year. Cruze interior looks good...exterior looks good...if they can get the quality and performance (fuel economy and decent handling) right then they have a winner there. Astra is good...just needs attention marketing wise...even so I've been seeing allot of them here recently. Keep Chevy, make Pontiac performance only (G8, etc.), use Saturn to bring over European models almost directly, figure out something between Cadillac and Buick...leave it at that.
All three need to seriously trim their lines, get rid of badge engineered cars, focus on small and mid-size sedans and small trucks, and then work their way up to the people movers again. Everyone needs a people mover but why can't we have smaller and larger people movers like a Mazda5/Kia Rondo and then have a larger vehicle like the Flex/Acadia.
Thats how I see it anyways.