I don't think Delta management is quaking in their shoes. This will be a domestic airline with no international feed to speak of. Add to that the "double-dip" or continued recession and we'll see how all this plays out...
True about domestic only. And yes it won't affect Delta's international service. However, you can bet they will make a big dent into Delta's domestic services as the Airtran and Swa networks connect up.
Just my opinion......
FNG