Fun fact. The original was produced while the manga was still being written, and so caught up with it. The manga's author gave the produces permission to go on and develop their own ending. When Brotherhood was made, the manga was complete, and so they matched. Well, that's according to this guy, anyway, and he seems to know what he's talking about: https://www.youtube.com/watch?v=KQSQH2DQRdM