Top-4: Superstars who could Headline WWE WrestleMania 40

The Universal Champion, Roman Reigns, will certainly main event WrestleMania 40.

Source: wwe.com

CM Punk is set to main event WrestleMania 40.

Source: WWE

The Rock might be added to the Roman Reigns storyline mix.

Source: WWE

Seth Rollins would defend the WWE Heavyweight Championship at WrestleMania 40. He will likely main event one of the nights.

Source: wwe.com