During today, the official Twitter account of the Nationwide Arena has confirmed that John Cena will be present at Fastlane, an event that WWE will hold in that pavilion.
You have to remember that Fastlane will be an exclusive event for the brand SmackDown, while right now, John Cena, despite his role as a free agent, is limited to Raw, the brand in which he made his last televised appearance for WWE during the show held on December 25, 2017.
In addition, John Cena is confirmed to appear in the episode of the celebration of the 25th anniversary of Raw, to be held on January 22. On the other hand, Fastlane will be held on March 11, so it is likely that Cena will change brands sometime between the end of January and the beginning of March.
— Nationwide Arena (@NationwideArena) January 5, 2018