The Clone Air Force has planned to replace the K45C with the K55 Future Combat Fighter sometime in the late 2130s, however the K55 has now been cancelled. Instead, the CAF will continue to improve and refine the K45 Falcon with the C mid-life upgrade the CM now pushed back to the early 2130s. It will also be now called the K45F.
The K45F will have the hybrid engines planned for the K55 which will improve loiter capabilities and reduce IR and sonic emissions. It will also have the next generation radar and databus system planned for the K55.
In other fighter news, the CAF have conducted a survey of it's K40S fleet (late production K40s which included some K45 technology) and these planes will be able to stay in service until the early 2130s. The rest of the K40 fleet is ageing fast with withdrawals likely to speed up over the next couple of years.