with flatz amazing Save Game Tools we can also unlock the 2K15 Save.
1. Dowload this rar archive https://www.sendspace.com/file/sqls72 and extract it, you get a Directory called "Save Game Tools".
2. Create a new User Account on your PS3 or use an Account WITHOUT a WWE2K15 SAVE, create a SaveGame with a game without save protection and copy that SaveGame to a usb stick/hdd. Don't use your main Account or your Main WWE2K15 SaveGame gets overwritten.
3. Connect your usb stick/hhd to your PC