According to the cover note of Full Metal Panic! Sigma vol.15, a spin-off novel of Full Metal Panic! was announced to be released by Fujimishobo. It's a sequel taking place ten‐odd years after the finale of the original novel. A newface author Ohguro Naoto will write it under the supervision of Gatoh Shoji.
"Tonight, I sit in the eye of the storm. As fire boils around me, I press forward, winds and lightning lashing my wings. I am no match for what I face. Yet I will not back down, and though fear may place it's stranglehold on my heart, courage will see me through. With tears in my eyes, I hit full throttle. My engines become an inferno, and my weapons light up, awaiting my command.
If I die tonight, I will do so fighting for everything I believe in."