Halo 4 Puzzle e-mail

I got this e-mail saying I have one of the 32 pieces for the Halo 4 puzzle. Anyone know what I am supposed to do with the puzzle piece?

You don’t have to use it if you don’t want to, the puzzle’s been solved.

OP, don’t worry about it, the puzzle was solved.
Finished Puzzle
My Render of what it would look like as box art.