I think that there’s no reason to insist that there are spoilers in the two videos that you can check out below (including a bit of Master Chief’s face), so it’s for you to decide if you really want to check out the Halo 4 ending videos below or wait for a little longer and try to complete the game yourself.
Halo 4 Ending (Normal Difficulty)
For the ending, start watching after 11 minutes:
Halo 4 Ending (Legendary Difficulty)
And this is it! What do you think, though, about the Halo 4 ending?