All I want for Christmas is a Kawasaki K-100! This was one of the last fighter planes the Japanese developed before the end of the war, and was basically a re engined Tony. While opinions on the performance of this plane seemed divided it is generally agreed that it was an excellent performing fighter. There are a number of well documented combats in which the K-100 outperformed Hellcats, Corsairs, and Mustangs.
It would be a lot of fun and add to the main arena game.
