This years Special edition and Special edition superstar will be the Hulk Hogan. This was confirmed by Hogan himself as he tweeted about signing 25,000 copies of the special edition. Which he also talked about a photo will be included as well. What else could come with the special edition is still unknown.

My theory

Hulk Hogan classic as a playable character

Special Edition cover for 2k15

Special edition tin

Signed photo

one of the DVD's from the Hogan the ultimate anthology

and a Hogan Bandana

It seems with Hogan being the special edition character and Sting being the pre-order character, they maybe the only legends in the game. So maybe WWE 2k15 might focus more on today's current roster. Both main roster and NXT roster will in the game?

Hogan will already be in the game. Pre-order special hogan could be just an attire.