0fsgivin mentioning Cinderella Man reminded me of this surprisingly good movie. We all know the original Rocky, we know that it's a great movie, and we all know how the sequels turned the story into something truly retarded.
This last movie featuring the character is different. He's not fighting an angry silverback or the Soviet ubermensch, Rocky is just an old guy whose wife died recently and who has trouble interacting with his son, he's a relic of a bygone era that doesn't know what to do with himself anymore, until one last chance to enter the ring presents itself.
It's actually a very well written story, Stallone shows that he can actually act, the rest of the cast is also great as well, and it really did manage to remind me why the original Rocky movie was such a hit.