Perhaps all of the airlines should paint a plane or two in a historic livery associated with it. Here are some examples:
Delta: Could paint a 737-200 in white Western, a 737-300 in silver Western and a 727 in Northeast livery.
American could keep an MD-80 in Reno Air colors, and paint a 737 in AirCal livery.
Continental....would begin to be another WestPac...
A DC-10 in the old golden colors.
A 777 in the VERY old golden jet colors (that would be sweet)
An MD-80 in New York Air
A 737-300 in PEOPLExpress
A 737-700 in Frontier
Northwest would be another one.....
Take some DC-9's, and paint one each of a
a 727 in the Republic goose livery
A 757 in the final Republic white and grey livery
An A320 in the plain red tail livery
A United "Friendship" 777 would be a classic..
An Alaska MD-80 painted as Jet America would be stylish.
A Southwest 737-700 painted as Muse Air would make history.
A Southwest 737-300 painted as TranStar will be the most photographed 737 in the world (after the WestPac Simpsons plane).
A USAir(ways) MD-80 repainted as PSA would redeem USAirways in innumerable ways...or stir up a lot of tension.
A USAirways A320 painted as Piedmont would rank as one of the best practical jokes in history.
A USAirways F-100 painted in the old rust colors would be awe inspiring.