Don't bet on it Evan. I suspect with funding shortfalls, the F-15 upgraded with AESA radar will be serving for quite a few years to come. Certainly not in Air Superiority role overseas for which it was intended, but definitely in the rear as an interceptor for cruise missiles, UCAVs, and manned stealth aircraft. The F-35 is going to be the decisive factor. There just aren't enough F-22s on order to make that much of a difference. It's bye-bye F-16 though.