Whakaotihia te rerenga korero e whai ake nei: Mai i te Hanuere tae noa ki te Paenga-whawha 2018, i uru a Cena ki tetahi korero e ngana ana ia ki te rapu i tana "ara ki WrestleMania". Whai muri i tana ngaro i te Royal Rumble me te tukinga o te Elimination Chamber hei whakatau i te kaitono tuatahi mo te Whakataetae Ao i te Elimination Chamber, me te wero e ono-pack i Fastlane mo te WWE Championship, i tukuna e Cena he wero ki te Undertaker mo te tukinga i WrestleMania 34. I whakahoutia e ia tana wero i roto i nga wiki maha e whai ake nei, engari kaore i whakautua mai e Undertaker. I WrestleMania, i muri i te peia atu a Cena i a Elias i roto i te whakaeke, ka hoki mai a Undertaker me te whakaae ki te wero a Cena, ka miharo a Cena ka ngaro ki a Undertaker i roto i nga meneti e rua noa iho. E toru wiki i muri mai, i te Greatest Royal Rumble, ka hinga a Cena i a Triple H. I muri i te tukinga, ka whakawhetai ia ki te mano mo te piri ki a ia i roto i te waa uaua, e kii ana i tana hinganga ki a Undertaker i WrestleMania me tana wehenga tata nei ki a Nikki Bella. I muri mai ka haere ia ki te okioki ki te arotahi ki tana mahi whakaari me tana mahi pouaka whakaata. I hoki mai a Cena i te Oketopa, i whakataetae i roto i te tukinga takirua me Bobby Lashley ki a Elias me Kevin Owens i Super Show-Down i Melbourne, Ahitereiria, i wikitoria ai raua ko Lashley. I te wa o te huihuinga, i whakaatuhia e ia tetahi makawe hou tautohetohe, i arahi ai ki nga urupare maha mai i nga kaiwhaiwhai i runga i te ipurangi. I muri mai ka mea ia i whakatipuhia e ia ona makawe mo tetahi kiriata e kiriata ana ia i Yinchuan, Haina. I whakaritea hoki ia mo tetahi whakataetae i Crown Jewel i Saudi Arabia, engari i kore a Cena e mahi i taua huihuinga i muri i te
te kohurutanga o te kairipoata Saudi a Jamal Khashoggi. I te Whiringa-a-rangi 29, i panuitia kua whakawhiwhia a Cena ki te Winner Muhammad Ali Legacy Award na "Sports Illustrated".