At Wrestlemania 35, John Cena returned back to the WWE interrupting Elias’s performance. However, he was not the John Cena of recent memory instead he reverted back to his Doctor Of Thuganomics gimmick that was very popular on Smackdown in 2002.
Time will tell if this is a one off appearance in his former gimmick or if there will be more battle rapping from John Cena to come.