At Hell in a Cell, John Cenas United States Championship open challenge backfired in the worst way imaginable, as Alberto Del Rio showed up unannounced and defeated him for the title in less than 10 minutes. So bad was the defeat (apparently) that Cena promptly took a sabbatical from WWE for two months. Cena returns to WWE Monday night to challenge Del Rio (though apparently not for the title he lost), and while his return is being hyped, WWE is being silent on where hes been for the last two months. In reality, Cena was off filming a TV show, which is a perfectly legit reason to take some time off. But despite being mentioned several times on Raw during the past two months, no reason has been given for Cenas absence.So will we actually get a reason for why Cena left after losing a match for more than two months? Or will we just brush it off and welcome him back with open arms?