I believe Kızılelma is tied with KAAN as the most promising Turkish aviation project to date. Not because it's better, but because there is a chance that Kızılelma will have vastly superior conops design and easier production. It will sell like crazy. Just needs one A2A kill and floodgates will be wide open.
KE will depend on SATCOM for remote control. Which is not great for high intensity scenario. Other option is completely autonomous BVR engagement. Which would require an insane AI and high level of integration with other platform + sensor fusion. I am not convince we will see anything like that before 2040. However controling KE from a two-seater KAAN or even Hurjet looks more realistic.