#2. John Cena understands the importance of the future
Since 2016, John Cena has proven that he's one of the most selfless "top guys" in WWE history. Hulk Hogan and 'Stone Cold' Steve Austin have been glorified as the all-time great top stars but they didn't have the longevity that Cena had, nor did they have the selflessness in putting people over the way Cena has.
In both singles matches and multi-man matches included, Cena has put over the likes of AJ Styles, Shinsuke Nakamura, Roman Reigns, Finn Balor, and more since becoming a part-time superstar. He truly understands that his time is done and isn't the type to milk his return and go over younger superstars with no long-term benefits. Having been in the system and having carried the company on his shoulders for a decade, he knows how hard superstars work when traveling on the road and Wyatt isn't just any hard-working superstar - his dedication to his character and craft is on a whole other level.
Why else would Roman Reigns admit that he would rather face The Fiend at WrestleMania over Goldberg? Cena's understanding of the long-term benefits is one of the reasons for the match.