The last cub
I'm absolutely certain the last cub died. Watch closely the end of the movie. It's so obvious they used old footage when the cub supposedly reunites with its mother and then after, you don't see him in the same shot with the pack of lions.
Why would they do that ? So people wouldn't be TOO sad ? So they would give more money ? So they could use their last shot of the "last lion" ?
And I thought this movie was awesome until that point. I am so disapointed. I mean, they make a point of telling stuff like it's the law of nature and all that, and then they just fake a revival.
Frankly, if they were gonna cheat the audience they could have intervened and saved one the cubs instead. Now THAT, I would not be upset about. And really, they could have saved the one with the broken back.