Depending on where the player chooses to pre-order, he will get the alternate costume for Ryu (from GameStop), Chun-Li (from PlayStation Store/PC Digital), Cammy (from Best Buy) or Vega/M. Bison (from Amazon).
No word yet as to when the game will officially release exclusively for the PlayStation 4 and the PC.
Endnote: Ryu with a mustache. 'Nuff said.