GameStop is offering a Majora's Mask pin as a bonus when you pre-order Code Name S.T.E.A.M. for 3DS. The game releases on March 13th.
It seems like GameStop knows that Zelda fans are going to want this pin, and that they can offer it with any game and still get people to pre-order.
It worked for me. I knew nothing about this game when I made my pre-order. I looked up a trailer later, it seems like it could be fun.