The Clone Air Force has outlined it's plans for the follow-on from the K45C fighter. Initially it was thought the CAF would field a third generation sometime in the 2130s but now plans have changed and the CAF wants a clean sheet fighter which has been given the name Future Combat Fighter (FCF) K55.
The K55 will have a hybrid powerplant offering improved cruise loiter capabilities and improved acoustic and infrared stealth. Not much else is known about the K55 though as flight testing is not due to begin until the next decade. One source says the K55 will be optionally manned and will be able to act as a director for drone swarms.
The K45C is still in production. An improved model, the K45CM, is thought to be in development for the final batch for production this decade.
