Just imagine it...
An annual event in which all special game modes created are playable and rotate daily.
An event in which every skin ever made was avalible for purchase. Legacy, Winter, Harrowing... Everything avalible.
An event with special missions which can grant you limited edition content. With different missions being tied to the different rotating game modes.
An event in which both the Essence store and the Special disount shop were open.
...I guess one can only dream.