According to several reports, former World Heavyweight Champion Christian has been cleared to compete, and WWE has plans to bring him back to television after WrestleMania, most likely as a babyface character.
Christian has been out with an aggravated shoulder injury since July of 2012, when he made his return just a few months after being taken off television due to a storyline shoulder injury. His last run with WWE was as a babyface, and Christian has noted in several interviews that inducting Edge into the Hall of Fame in 2012 was a major reason he wanted to end his career with the fan's support.