I think that Hulk Hogan is a legend in wrestling and has left an indelible footprints in the wrestling industry, with his unique skill talents and charisma. He was an entertainer, the very best of his kind. But I find John Cena is more likely to win.
If we were to assume that both Hulk Hogan and John Cena, were of the same age, and were to have a wrestling match up, John Cena, would be no match for Hulk Hogan. I don't think John Cena, would be able to defeat the likes of Andre the giant and King Kong Bondy - these men were enormous in size and strength, yet Hulk Hogan, was able to lift them up the floor and slam them down again. Something which I believe even if John Cena was given the opportunity, he would not be able to do.
Do not get me wrong, I do believe that John Cena is a great wrestler, but he is not in the class of Hulk Hogan. However, if both John Cena and Hulk Hogan were to have a wrestling match today, I have no doubt that John would be victorious, although Hulk Hogan will definitely put up a fight.
I think first of all, Hulk Hogan is past his prime, he is a much older man, less agile, more feeble, and his reflexes would have slowed down, so would his stamina and enormous energy. John Cena, on the other hand is at the prime of his youth, and youth is an enormous advantage in the wrestling game. It is both a physical and mentally tasking game. While Hulk Hogan would have the mental agility, he would not be able to cope with the physical demand of the game, although he may seem in good shape.