Still an A-1 production, Prisoners of the Sky is unironically awesome. I'm not saying this in the sense that it's surprisingly good for T7DS standards, because I'm aware this franchise doesn't have an absolutely stellar reputation. No, I'm saying that I thoroughly enjoyed every moment of it. There is some debate as to whether or not it is canon, but regardless, it's a genuinely good story with spectacular action sakuga that I actually went back to rewatch. I didn't find myself checking the remaining runtime once, which is fairly rare with me when it comes to anime films. Even during the first act, the set-up wasinteresting and kept me excited.