We have received reports from players about an issue where saved game data is being reset in WWE 2K15.
The tech team is currently investigating the issue, but we do have one workaround to recommend in the meantime.
It's possible to avoid the issue by not letting the game idle on the title screen. As long as you don't let the game idle on its title screen, you should not encounter this issue. The team has determined that this won't happen on the following screens: Main Menu, My WWE, Xbox Live, 2K Showcase, Story Showcase, 2K Showcase Timeline, Options, and My Creations.
This post will be updated when we have more to report.