#2 John Cena

This is a dream match that WWE fans have been talking about since Samoa Joe arrived on the main roster, because these two actually have quite the history together. I
t's nothing extensive, but when both men began their wrestling training, they attended the same school before Cena went off to the WWE and Joe went off to become a star in the new Ring of Honour and TNA promotions.
Cena reportedly has a 'mystery' match planned for WrestleMania 35, but we have no idea what that is obviously, but the prospect of these two old training partners finally locking horns at the Showcase of the Immortals is too good to pass up.
The show already has 15 matches planned, so putting Cena in with Joe in the case of Mysterio's absence will make the show a little more bearable, and would make the already great show a little more diverse.