What steps do you need to follow to unlock all items, arenas and characters in the Career? (WWE 2K15)

Download my save :), but in the case everything is detailed in the game, if globally something like this - go through 2k showcase perfectly, go through a career twice doing good deeds, the second bad, play a match through PLAY on the SMACKDOWN arena, win a normal belt, diva belt, team belt, created by fighters in WWE UNIVERSE.