#3 The face of WWE John Cena should have a match at WrestleMania
Simply put, John Cena is WWE, which makes his absence from this year's WrestleMania the end of an era. As the face of the company for years, Cena has appeared at "The Show of Shows" since WrestleMania XX in 2004.
Even when he didn't wrestle, he appeared on the show. Last year's Firefly Funhouse Match was an unforgettable experience. At WrestleMania 35, he showed up as the Doctor of Thuganomics to beat-up Elias to a tremendous ovation.
The Leader of Cenation has been seen less and less in WWE over the years as he embarked on a career out of wrestling.
John Cena is closing in on Rock-levels of Hollywood superstardom, and to mark WrestleMania's return to its spectacular status, WWE would have been wise to lock Cena down for a match/exhibition to commemorate the big occasion.
Cena has gone on record stating that it won't be possible for him to be at this year's WrestleMania due to filming commitments, which must go down as a significant oversight on WWE's part.
The Leader of the Cenation is an integral part of WWE and WrestleMania history, and it will be an extraordinary change for him not to be a part of this year's Showcase of the Immortals.