Dee ihe na-aga n'ihu maka paragraf a - Site na Jenụwarị ruo Eprel 2018, Cena tinyere aka na akụkọ ebe ọ na-anwa ịchọta "ụzọ ya na WrestleMania". Mgbe o meriri n'asọmpi Royal Rumble na asọmpi Elimination Chamber iji chọpụta onye ga-abụ onye isi na asọmpi 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-asọmpi 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. A haziri ya maka egwuregwu na Crown Jewel na Saudi Arabia, mana Cena jụrụ ịrụ ọrụ ahụ mgbe ogbugbu nke 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".