Whoever walks out as WWE World Heavyweight Champion will be set to face ' The Big Dog , ' at ' Mania .
Fans could be set to see the former Shield brothers go to war on the grandest stage of them all .
Whoever walks out as WWE World Heavyweight Champion will be set to face ' The Big Dog , ' at ' Mania , and fans could be set to see the former Shield brothers go to war on the grandest stage of them all .