Replacement for is being sought, 2 most likely ate Kawasaki T-4 and HAWK 128/LIFT Series (The latter being a 5.0G Capable Trainer), HAWK has backing of Northrop-Grumman
I wish them luck in that. The B-52 was to be replaced twice, B1 and B2 both failed. The U-2 was to be replaced by SR-71 and sattlites, failed. Give the C-130s age a few planes tried to replace and failed too.