Although I think a 744 in AA
colors would look great, I just don't think it will be in the cards. For AA
's network, the 777 is simply a superior aircraft in virtualy every regard. The only airlines that really need the capacity of a brand-new 747 are airlines with a significant presence in Asia. For most airlines, the 777 provides plenty of capacity for their routes. If it doesn't, the 777's efficiency allows them to increase frequencies if necessary. With competition coming from the A380, demand may significantly slack for the 747 series.
Which brings up an interesting personal point. In most of my posts on this forum, I admit that I have been critical of those who get upset about the decline of older aircraft, such as the 727, DC-10, L-1011, MD
-11, etc. Generally, I don't see those aircrafts' disappearance as a bad thing because they are largely inefficient and simply outdated. However, I must concede that I will probably shed a few tears if and when the 747 is no longer in service. That would truly be a sad day.