[rikkir]

If the 747 is retired, has there ever been any indication of what the next AF 26000, or Air Force one would be?

I have never seen, or read anything that suggests it.

[PeteePie]

If the 747 is retired, has there ever been any indication of what the next AF 26000, or Air Force one would be?

Given the rapid decline of the USA I'd say all gov't officials will be instructed to use Space-A on USAF missions and/or purchase airline tickets through cheapoair.com