Mezue ahịrịokwu na-esonụ: Site na Jenụwarị ruo Eprel 2018, Cena tinyere aka na akụkọ ebe ọ na-anwa ịchọta "ụzọ ya na WrestleMania". Mgbe o meriri Royal Rumble na Elimination Chamber egwuregwu iji chọpụta onye na-esote nọmba otu na-azọ maka Universal Championship na Elimination Chamber, yana ihe ịma aka isii na Fastlane maka WWE Championship, Cena nyere ihe ịma aka nye The Undertaker maka egwuregwu na WrestleMania 34. Ọ kwughachiri ihe ịma aka ya n'ime izu ole na ole sochirinụ, naanị ịnata azịza ọ bụla site n'aka Undertaker. Na WrestleMania, mgbe Cena chụpụrụ Elias na esemokwu, Undertaker mere nlọghachi na mberede ma nakwere ihe ịma aka Cena, na-eduga na Cena na-atụ ụjọ na Undertaker na naanị nkeji abụọ. Izu atọ ka e mesịrị, na Greatest Royal Rumble, Cena meriri Triple H. Mgbe egwuregwu ahụ gasịrị, o kelere ndị mmadụ maka ịrapara ya n'ahụ n'oge oge siri ike, na-ekwu maka mmeri ya na Undertaker na WrestleMania na nkewa ya na Nikki Bella na nso nso a. Mgbe ahụ ọ gara ezumike iji lekwasị anya na ọrụ ya na telivishọn. Cena laghachiri n'ọnwa Ọktoba, na-asọ mpi na egwuregwu otu egwuregwu na Bobby Lashley megide Elias na Kevin Owens na Super Show-Down na Melbourne, Australia, nke ya na Lashley meriri. N'oge ihe omume ahụ, o kpughere ụdị ntutu isi ọhụrụ na-ese okwu, nke dugara n'ọtụtụ mmeghachi omume sitere n'aka ndị na-akwado ya na ịntanetị. O mechara kwuo na ọ hapụrụ ntutu ya ka o too maka ihe nkiri ọ na-ese na Yinchuan, China. E debekwara ya maka egwuregwu na
Crown Jewel na Saudi Arabia, mana Cena jụrụ ịrụ ọrụ ahụ na-eso ogbugbu onye nta akụkọ Saudi Jamal Khashoggi. N'ụbọchị iri abụọ na itoolu n'ọnwa Nọvemba, a mara ọkwa na e nyela Cena onyinye Muhammad Ali Legacy Award Winner site na "Sports Illustrated".