I'm running iOS7.0.4 on an iPad 2, and the ending to the Forgotten Isles will not play. As my general strikes the killing blow on Akamoto, the word "Winner" begins to appear on screen, but then everything freezes. The music keeps playing but nothing happens.
I luckily saved my game right before the killing blow, so I was able to test it multiple times. The exact same thing happens each time, even after I cleared some space and restarted my iPad.
It was a pretty major letdown. I had to look up the ending for the XBox version on youtube to see what happens.