It's looks at this point John Cena and Nikki Bella are just working this break up for the show. While the only things that were legitimate was that the wedding was called off that a lot of money went into. Also, the fact they each lived single lives for a few weeks. Reports are Nikki has been seen leaving Cena’s house and the two have been spotted at hotels together over the past few weeks. It’s very likely the break up was done just for their show. Cena had been incredibly adamant about not getting married again, it’s a very real possibility that the wedding (and the subsequent calling off of said wedding) was just a work to draw viewers.